what's a bookmark? well for example umm you open a tab and it disappears a couple days after you open it. basically what i'm trying to say is that having a bookmark is like an app you press on it and it takes you to it you don't have to write the website every time you want to read.
____________________________________you go the the website then at the bottom you have the share button press it
you have options press the add to home screen button
after you do it it's going to look like this
and after you can press it anytime you want, it's very easy it's not that hard