3. Ninja Outreach: Full disclosure this is my own tool, and it is actually an outreach tool, so you may be wondering how it plays into Keyword Research. The fact is there are quite a few data points that NinjaOutreach gets for me that I find useful in keyword research, such as the articles that are ranking for the keyword in Google, their domain authority, their page authority, the number of backlinks they have, and other social and contact data. It's pretty valuable stuff, especially if there is going to be an outreach campaign tied into the keyword research. I wrote a great article with Jake from LTP showing the combination of the two tools.
What’s the point of creating a website if Google and users can’t access its content? It’s incredibly important to check everything from your robots meta tags to robots.txt file to XML sitemaps and more. It’s highly recommended to check the robots.txt and robots meta tags since they usually restrict access to certain areas of your site. Just be sure to check them manually and ensure that everything is in good shape.
Hey Alex – this is a good question. No tool is going to be spot on. My advice is to not look too much into the accuracy of the metrics, but look at it more as a relative measure. I’m finding Ahrefs to be a good barometer for keyword competitiveness, but I’ve also heard great things about KW Finder lately. I think it’ll more come to personal preference. Both are solid options.
Note - at this point Google already has baseline metrics from other search results. So, if your site beats them by a factor of say 3x then Google thinks - hey.. this page looks to be way better - so why not stick its rankings in the long term and why not even bounce it up higher and see what happens and measure again how users engage with the site?

Of all the tools listed in this article, Moz Link explorer is an old one & quite popular.  If you want to compare backlinks between two or more domains, Open Site Explorer is worth trying. This tool works best when you have a paid account of SEOMOZ though a free version of this tool is good enough to get you started checking the backlinks of your site and the sites of your competitors.