How to add google map using JS?

Question

Google Maps

I want to add a similar card to my online store, but I don’t know how, I’ve never come across it, I found a guide - here https://habr.com/ru/post/324880/. But I can’t, I don’t know what the problem is, I will be grateful if anyone can help explain. BUT I would be happy with a similar solution, or an explanation of how to solve this issue)
I’ll say in advance that I googled and the most normal thing was that I found it from the previous link