Google Trends - A good tool for understanding seasonal content. It also displays results in a more visual way but presents much simpler results than Keyword Planner. It shows interest in keywords and search queries, but doesn't give you the exact number of searches or your organic position. It is definitely worth having with Keyword Planner, but I wouldn't recommend only using Trends.
The kind of content you create depends on your audience's needs at different stages in the buyer's journey. You should start by creating buyer personas (use these free templates, or try makemypersona.com) to identify what your audience's goals and challenges are in relation to your business. On a basic level, your online content should aim to help them meet these goals, and overcome their challenges.
Since then, many readers, students and not, have reached out and asked about how they can learn digital marketing. It’s a field that’s been ravaged by spammy information and bad ebooks, and it’s difficult to know where to start and what’s worth learning. I’ve been giving out some form of this advice for the last two years, so I figured it would make sense to organize it and provide it here, for anyone motivated enough to follow it.