it’s a part of NEW WEB 2.0/COLLABORATIVE FUNCTIONALITY in PeopleSoft The People Tools Related Content Framework is delivered with People Tools 8.50. In addition, with a People Tools 8.50 license, you are able to use the following three PeopleSoft Enterprise Portal related content services:
• Related Discussion service
• Related Links service
• Related Tags service
You must install and configure a PeopleSoft Enterprise Portal database to host the data for these services. However, a separate PeopleSoft Enterprise Portal license is not required to use these related content services as described above..
View NEW WEB 2.0/COLLABORATIVE FUNCTIONALITY in PDF
Those who want to know more about related content feature, can go through this GreySparling blog post . They have given a good draft on this feature