What is this called?

[youhearus]

I'm building a website that displays Spotify embed links in a grid. The grid is 4 blocks across and then a new row of four and so on as I continue to add songs. When I go to add a new Spotify embed into these rows I would like it to appear first in the list. What is this called where I want the new embed to come first rather than having to manually move everything down and over one to make room for the new song? If i knew what this was called I could google it and search for the answer.

Any help is appreciated