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Let's get started with the question,

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what version management

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or version control actually is.

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And if we think about this course so far,

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you saw that we worked on several web dev projects.

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And because of that,

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we also worked on well different code basis

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So to say,

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and our code evolved.

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So basically we could say that we started

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with the initial code.

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So the first code we saved in an individual project,

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and then somehow,

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well,

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we arrived at the latest code version at the final code,

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whatever you might want to call it,

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let's call it the code we had

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at the end of a specific module.

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Now,

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as you also saw to arrive at this latest code version,

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different well code iterations were necessary.

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Different stages of that code were required.

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In this course,

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You can also find different code snapshots of different

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stages of these individual projects

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to make sure you can download these.

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And we'll jump back on board in case

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we lost you throughout the

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module with our code in case you had a bug

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and so on.

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Now,

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the thing is that we are not

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well kind of creating these

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different code snapshots by saving the code,

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creating a new folder,

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and then copy pasting this version into this folder

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and calling this folder,

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whatever stage 1, 2, 3, 4,

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or anything like this,

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we are actually always working in the same folder

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Still,

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We are able to track our code

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to track the code progress that we make.

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And to also share the snapshots with you,

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how are we doing this?

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Well,

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the answer is we do this

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with version management

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or version control

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because this concept is all about efficient control

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and tracking of code changes over time.

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You'll see that changes here has this little asterisk added.

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This is simply due to the fact that

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although we have a web dev course here,

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the version management tools we'll learn about in the next

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lectures cannot only be used for web dev.

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You can also use these tools to manage your data analysis,

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your data science projects,

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or even to manage your Excel files,

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for example.

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So that's just a side note.

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This is a web dev course.

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Therefore we want to track our code changes over time.

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So this is the idea behind version control.

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It's the idea to easily save different stages of your code

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without having to create side copies

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or without losing any prior progress.

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Now by default,

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Well,

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this is hardly possible.

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Therefore, we need specific tools

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which help us to efficiently manage our code.

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And well guess what,

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these two tools are Git

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and Git hub,

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but what are Git?

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This is the Git logo

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and top that's the GitHub logo.

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What are these tools in detail now?

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Well get is actually a local tool,

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a free local tool,

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which you can download

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and install on your computer

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on your windows or Mac machine.

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Doesn't make a difference.

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And this tool then,

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once installed

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well, helps you to control

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the different versions that you have in

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your code for your web development projects

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and Git does this

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by a so-called repositories.

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This means a project managed by a Git

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automatically has such a repository

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we'll of course explore how we can create such

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a repository and how these repositories work.

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But generally that's Git in a nutshell,

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a local tool,

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which manages different versions

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of your web dev projects in

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so-called repositories.

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That's it.

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Git is a local tool as a set though.

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So it's great

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If you're working alone on your projects,

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at least in a first step,

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we also have get have GitHub though.

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GitHub, although,

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sharing partially,

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at least the name is a separate tool,

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not related to Git in general.

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And GitHub is a cloud hosting

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provider for Git repositories.

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You see,

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there seems to be kind of a connection.

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So, whilst Git is a local tool,

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GitHub brings the projects

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we manage with Git to the cloud.

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So therefore,

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in addition to the fact that in case our computer gets

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stolen or crashes,

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we won't lose our code.

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GitHub is also perfect to collaborate in

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or contribute to web development projects.

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This means we can store our project on GitHub

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and then add other people to also work on our code

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or other people can also share their work

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and we can collaborate.

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This means, for example,

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adding features or fixing bugs

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in these projects,

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also something we'll explore for all this module.

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The important thing is that GitHub is the world's largest

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development platform.

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Bringing Git's local repositories to the cloud.

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And that's exactly where these two tools

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are connected in the end.

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With Git being a great local tool to manage projects

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and GitHub being a great tool

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to hosting these projects in the cloud.

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Well, these two are the perfect combination

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and must know combination if you want to

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become a web developer,

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which you actually are already,

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and or if you want to work as a web developer

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for a company.

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So this is the core idea behind these two tools,

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still a bit abstract,

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obviously,

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but these are only the first steps.

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Of course,

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we'll have a close look at these tools very soon

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before we do that, though,

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we have to have a look at another concept

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related to using these two tools.