I love the interface that's user-friendly and easy to understand. I can do a quick search and find the information I need or use it to double-check my articles and make adjustments.

RankIQ not only helps you get low-competition keywords, but it also lets you have an abundance of topics available in different niches. It is the best tool to use for research when starting a new niche site. And the niches it covers are pretty robust. On the pricing, it's quite affordable.

I use the content optimizer feature for every post on my site. It has made a huge difference updating old posts and growing my blog.