BuzzSumo is a content search engine that I guarantee will change how you find your content and the way you look at content discovery in general. It is extremely easy to use and yet very powerful, which is why it should be a tool that you get familiar with sooner rather than later.
To be effective as a content marketer you need knowledge and insights. BuzzSumo finds me the popular content, which I can review and decide to share. One advantage of BuzzSumo is that you can see the platforms where content is not being shared much.