Introduction to GitHub

Introduction

Up to this point, you've been using Git entirely on your local computer. Git allows you to track changes, create commits, work with branches, and manage project history. However, modern software development rarely happens on a single computer.

Developers need a way to store repositories online, back up their work, collaborate with others, and share code across multiple devices. This is where GitHub comes in.

In this guide, you'll learn what GitHub is, how it relates to Git, and why it has become one of the most important platforms in software development.

Why GitHub Exists

Git is excellent at tracking project history, but Git itself does not provide a central online location for your repositories.

Without a platform like GitHub, your repository would exist only on your computer. If your hard drive failed or your computer was lost, your project could disappear with it.

GitHub solves this problem by providing cloud-hosted repositories that can be accessed from anywhere.

Real World Example

Imagine building a website on your desktop computer. Without GitHub, the repository exists only on that machine. By pushing the repository to GitHub, you create an online backup and gain the ability to access the project from another computer whenever needed.

Git And GitHub Are Different

One of the most common beginner misconceptions is thinking that Git and GitHub are the same thing.

Git is the version control system. GitHub is an online platform built around Git repositories.

Git	GitHub
Version control system	Cloud hosting platform
Tracks project history	Stores repositories online
Runs on your computer	Runs on GitHub servers
Creates commits and branches	Hosts and shares repositories
Works without internet	Primarily cloud-based

You can use Git without GitHub, but GitHub becomes much more valuable once you begin collaborating with others or working across multiple devices.

GitHub Mental Model

Think of Git as the engine that manages your project history and GitHub as the online home where that history is stored and shared.

Git creates commits and branches. GitHub stores those commits and branches on the internet.

Diagram showing Git on a local computer connecting to GitHub in the cloud — Git manages your repository locally while GitHub stores and shares it online.

Simple Mental Model

Git is the version control system. GitHub is the online platform where Git repositories live.

What Can GitHub Do?

GitHub provides much more than online storage. It has evolved into a complete software development platform used by individuals, startups, open-source communities, and large technology companies.

Feature	Purpose
Repository Hosting	Store repositories online
Backup	Protect projects from data loss
Collaboration	Work with other developers
Pull Requests	Review proposed changes
Issues	Track bugs and tasks
Actions	Automate workflows
Documentation	Publish project information

While many of these features are advanced topics, understanding their purpose helps explain why GitHub became so popular.

Understanding Remote Repositories

A repository on your computer is called a local repository. A repository hosted on GitHub is commonly called a remote repository.

Git allows these repositories to synchronize with each other.

Local repository communicating with a remote GitHub repository — Local repositories can exchange changes with remote repositories hosted on GitHub.

Repository Type	Location
Local Repository	Your computer
Remote Repository	GitHub servers

Later in this learning path, you'll learn how to connect local repositories to GitHub and transfer changes between them.

Why Developers Love GitHub

GitHub became popular because it solves several important problems at the same time. It provides backup, collaboration, visibility, and a central location for software projects.

Open Source Example

Thousands of developers contribute to projects such as programming languages, frameworks, and developer tools through GitHub. Contributors from around the world can collaborate on the same repository without being in the same location.

Today, many employers, development teams, and open-source communities use GitHub as a standard part of their workflow.

GitHub In The Git Workflow

So far, your Git workflow has looked like this:

Local Git workflow showing working directory, staging area, and repository — Git can manage projects entirely on your local computer.

Once GitHub enters the picture, a new destination is added to the workflow.

Git workflow extended to include GitHub remote repository — GitHub becomes the remote destination for your repository history.

Common Beginner Mistakes

Mistake	Why It Happens	Better Habit
Thinking Git and GitHub are the same	Similar names	Remember Git is the tool and GitHub is the platform
Assuming Git requires GitHub	GitHub is highly visible	Understand Git works independently
Thinking GitHub is only for teams	Collaboration focus	Individuals use GitHub too
Believing GitHub automatically backs up local work	Misunderstanding synchronization	Changes must be pushed to GitHub

Why This Step Matters

Understanding GitHub is the bridge between learning Git locally and participating in real-world software development workflows.

Nearly every modern Git workflow involves some form of remote repository. Learning GitHub prepares you for collaboration, backup strategies, open-source contribution, and professional development environments.

Conclusion

In this guide, you learned what GitHub is, how it differs from Git, why remote repositories exist, and how GitHub helps developers store, share, and collaborate on projects.

Key Takeaway

Git manages your project history locally. GitHub provides an online home where repositories can be stored, backed up, shared, and collaborated on.