If your controller OS version is above 6.4.2.x you can check the same from dashboard APPRF feature. APPRF displays all the traffic catagories and the user(s) traffic catagories.
the web traffic would be normally classified just as 'Web' in the catagory. If you need specific inspection of what the 'web' traffic could be, it is possible in 6.5.x.x versions however you would need a Web Content classification or Web CC License. Web CC license is a subscription based per AP license, which can classify all these web contents until the subscription time is over (example 5 years of subscription period). This is mandatory if you need to know what is the web content traffic, if not, its just classified as 'Web'.