Open pinpoints on google map

Good morning, i made 79 pinpoints marked on my google maps page with title and description, but how can i make the little “i” that other apps or the google maps itself have on the side of the description? It’s the info button that opens a page or screen, but i can’t find any tutorials on youtube.

If you want it inside the map inside your app, I think you can only assign a title and a description to you marker