Yes, normally when you go to a new website, it replaces the one you are current viewing on the screen. To have more than one around at a time, you need to use what are called "tabs". You can also use a new window, but let's start with tabs.

Software designers like to use physical office symbolism, because people are familiar with that. So think of file folders in a file cabinet. You can't see the pages in each folder, but you know they are there because each folder has a little tab that sticks up and has the title written on it. Your web browser, Safari, can have little tabs near the top which are just like this. Each one has a different webpage in it, with a title on the tab.

Here's a tutorial online, which shows you how to use tabs (and windows).

https://edu.gcfglobal.org/en/safari/...g-in-safari/1/

Scroll down to the section entitled "Windows and Tabs". There are nice, clear pictures with the important bits highlighted.

There's also a video there if you prefer.

(There's a whole lot of other technology tutorials at that site too: https://edu.gcfglobal.org/en/topics/ )

I hope this helps.