About
The about section is a series of pages with links to topics. Each topic is broken into sections defining the advantages of using git. It allows branching so that a developer can try out different things before merging. Git was developed to work in the Linux kernel so it is capable of handling large files. In the about section there are graphics to illustrate how it works.
Downloads
The downloads page includes free links to versions for macOS, Windows, and Linux. There is a section to look for older versions in case you are using an older operation system. There is also a section with logos that can be used in projects.
Documentation
The documentation page has links to the refererence manual, the Pro Git book Git videos and external links. The videos walk through how to use Git and the advantages of using it.
Book
The book is available online for free on the website. There is a link to it on every page. If a hard copy is desired, it can be purchased. It is also possible to download to a kindle.
Summary
The Git SCM website contains everything you need to know to use Git. This is another information packed resources online.