Here I am going to introduce an idea I personally feel it really helps to understand how git works, that is "sequence". In my opinion sequence is for describing a series of things like one following another, in git this is saying one "commit" following another "commit" and each commit is a record of a speicial change and the "commit" will help us checking back whenever we need.
let's quick have a look here.
just ignore the term "master", we will talk about it later. each circle represents a "commit" and the sequential of commits form a "sequence", it seems like a solo workflow but with the "commit" this idea will fit any project that you want to track of and any change you did will be able to check/recover back by looking up your commit.
For how commit helps us with this, go check commit.