- Wikis have become a popular way for groups to collaboratively create and share information. They allow anyone to easily edit pages and participate in discussions. - People now prefer to receive information from peers rather than authoritative sources like companies. There is also a demand for participatory media where people can actively contribute content rather than just passively consume it. - Wikis come in different types including public wikis like Wikipedia, private wikis for companies, and protected wikis with restricted editing rights like the CT UPA wiki. They provide an easy way for knowledge bases to be built collectively through discussion and editing.