How to compose h1 correctly?

Question

Search Engine Optimization

Hello, I have one question!
For example, there is a keyword "Window Repair Moscow" and I want to use it in the h1 tag. The question is - h1 should be strictly like a keyword or it can be diversified a little! For example, "Window repair in Moscow at good prices from such and such a company!" Will it be considered that I use the keyword (window repair Moscow "? and how should it be located in the tag at all (at the beginning in the middle at the end) and does it somehow affect?
​​Thank you very much for the answer)

Answer 1

Kernel (example!) :
window repair master Moscow window
repair in Moscow
window repair in Moscow cheap
repair of plastic windows in Moscow
repair of plastic windows in Moscow

Answer 2

everything is simple with Google - it follows the logic:
https://www.youtube.com/watch?v=ZEFsNlIBCRU
https://www.youtube.com/watch?v=lLTTQK5DjaI