Yahoo! Answers is one of the more popular Q&A sites out there for the average person (i.e. it's not targeted to specialist subject areas, and the user base is typically less geeky than followers of sites such as Quora and Stack Exchange).
This large user base can be advantageous in having more people see and answer questions, represents more diversity in the types of questions asked, but can also lead to some "interesting" questions and answers (some of which have great entertainment value).
Ranked in these QuestionsQuestion Ranking
Con Yahoo! account required
Both asking and answering questions require a Yahoo! account.
Con Very low quality of answers
Highly unreliable answers - often the answer doesn't even properly address the question.
Con Single answer picked randomly as "Best answer"
The window to answer question - and to rate answers - is very short, the website will just close the question and designate a "best answer'" randomly.