What is the name of the feature when all the pictures are combined and used into one picture?

Question

Images

I noticed that some developers practice something, they don't know what it's called.
That is, when there are many pictures, but they are all in one jpg file. How do they get the picture they need from there.
Or how it works.

I would be glad even just links to articles, then I'll figure it out myself

Answer 1

Are you talking about sprites ?