What’s your preferred method of making tea? (Tea bags)

I used to drink tea made by grams only when I had a cold and only pretty recently I really got into it, as in drinking it daily.

So my question is: Do you first boil the water then add the bags and let them infuse or do you add them from the start and boil them together? My grandmother taught me to boil them together, regardless of them being tea bags or plants.

PS: this is my first time discussing tea, none of my acquaintances like tea (they drink coffee or sodas).