Entry is the most popular page that attracted people to first enter your web site. Properly done, this can identify marketing and advertising efforts too. Exit pages are the page people left on. People will tend to go to the home page just before they leave, so expect that to be a number one exit in most cases for successful or unsuccessful sites. If the page is an extremely common exit point, you may want to change the page to remove a problem.
Link pages are always an exit point.
Remove them unless you feel comfortable with the traffic loss. This is a critical list. It would take a book to tell you all this can tell you. Your advertising program effectiveness can be shown here, search engine effectiveness, popular information links within your own site, popular issues clients seem to like, and so much more. If it was a search engine that was used to find the web site, a search string was probably used in the query.