Ext: The number external do-follow links that are on the page linking to you. Having a link on a page with only 3 do-follow external links can be a stronger signal than a link on a page with 100 external do-follow links. You'll notice the numbers are color-coded. Green means it's a good number of external links, black means neutral and red means there are too many other links on the page.
Openlinkprofile provides you with different options while checking backlinks for your blog. This free backlink checker tool is brought to you by SEOProfiler.  For example, if you need a detailed report or optimization, or if you want to check backlinks for a single page or an entire website, Link Diagnosis allows you to do all of this.  It also offers various types of outputs and other features.
You can also block certain files or folders with passwords to the public or from certain bots. For example if you are still setting up a site and don't want it accessed - you can block it. This is very useful when building your Private Blog Network, because you can block tools like Ahrefs and Majestic from crawling your PBN site and hence hide any backlinks to your main money site from being discovered by your competitors (and therefore hide your PBN entirely). You can read up on Private Blog Networks and how to build them in my PBN guide.

With so many other factors that determine how well your video does, there’s no reason to add the expense to your plate if it’s not already there. So, leverage your free options! Use them to find keyword suggestions and sort them based on their volume and potential for your business. If you decide that you need more after that, move up to the big leagues.
Yes solid keyword data dramatically changes the game as far as rankings go. I have seen many tools that provide Cost per click stats and meaningless charts that confuse most users. the data Jaaxy provides helps drive “organic” traffic to your site on a consistent basis which will out perform PPC sites every time. I like how you say thinking like the end user, as I feel that way when I search. I dive into what people are looking for and it really helps drive content idea’s. I have seen great results from that.