Consumer Barometer with Google is a tool that helps understand how people use the Internet across the world.
Quora is another valuable community where real people ask real questions and discuss the content they’re interested in and issues they care about. Other valuable communities for trend monitoring include:
Use Ahrefs to monitor the activities and content of competitors:
an amazing content analysis tool that allows you to view what is performing best based on keywords. You can easily track the most popular content of any domain and search for interesting trends.
CT for details to each.