How to create the effect of work in the monitor?

Question

Design

How to create such an effect.
Or it’s called to google, I don’t know what to catch on.

Answer 1

It's called mockup.
You need to google: free MockUp psd.
Briefly: You download a template where the monitor\iphone\ipad\etc is already drawn.
And stupidly insert the layout of your site\application\etc
into it.

Answer 2

You can search for what you need here graphicburger.com/mock-ups
or by request mockup in public vk