Save entity items for future reference. Many entity items can be saved like events, institutes etc. Put them in bookmark category like save, read later, refer, interesting etc. Check out what others are bookmarking here.
Ads can be text, link, image, flash, popup based on Slot Zone on portal and its services.
Create Ad to link to your product, company, job, institute, classified within Portal or point it to an outside Webpany.