Discover some of the best Google Trends keyword research and content strategy tips and ideas. Google Trends is one of the best free tools for Marketing and it can be used to improve your SEO efforts. When it comes to search engine optimization, you need to cover the most popular topics along with trending topics for your niche. That's why Google Trends can be a great tool for Content Marketing, Keyword Research, and Content Strategy. I love using it to build keyword lists.