I am a newbie tester for a web site. The backend of this site are several SQL Server databases. The UI is built with Ajax and ASP.NET. The whole site is hosted on Windows Server 2008. The site's strucuture is like this: several IIS web applications interact with a core WCF web service. This WCF web service is also a IIS web application.
Now I have got familiar with the site's workflow as a customer. It's quite simple. Just some mouse clicks on the button. But my mentor told me that there're quite a lot of test points during this "simple clicks". So what could they be?
Also, since I am totally new to this, could anyone give me advices on what aspects could I test this web site? Like function? Security? Performance? And so on. (The more detailed, the better.)
Update
It seems I am not used to thinking as a tester yet. So I would greatly appreciate any insights which could help me re-format my brain~ :)
Many many thanks.
(Also, I'd like to thank S.O. I know no other better place to post my questions.)