What is the correct name for such an effect?

Question

Design

Hello!
There is a picture, in the picture we clearly see some kind of texture in the form of 'squares'. What is the name of a similar effect in Photoshop (what is it, a texture? Do you need to download it, or can you somehow set it with basic Photoshop tools?)?
And if you google, what is the name of this style of photo design?
Thank you!

Answer 1

Halftone pattern
https://www.youtube.com/watch?v=usDDwwraaRk