Decently popular for its mail service. People used to use it vastly when there were a few options left. One of the biggest site on the web providing variety of services. But its search engine is not that strong.
This is a good site. Like any search engine caution is advised but not because Yahoo isn't the one to trust. It's the stuff that might come up in the search. Never a problem here, & always nice to have an alternative to just Google all the time.