In Safari on the iPhone you can see how many pages are open at any one time by looking at the pages icon: . When it's like this with no number inside it there is one page open. If there is a number inside the icon, that indicates the number of pages that are open.

Here are some tips for dealing with multiple pages in Safari on the iPhone:

To open additional pages in Safari tap on the page icon and select "New Page".

Once you have multiple pages, you can tap on the pages icon and then flick left or right to move between the open pages.

To close a page, tap pages icon flick to the page you want to close and then tap on the red X icon.