Yikes, it does appear Google stopped showing your page in most results for that keyword. (Hey, at least they've confirmed it!) If you now click where it says A

Yikes, it does appear Google stopped showing your page in most results for that keyword. (Hey, at least they've confirmed it!) If you now click where it says Average Position, you'll get a purple chart of your average position/ranking for that specific keyword over time. (You can actually click on each of those boxes to turn the graphs on & off.) In my case, some of my keywords have a very obvious & sharp drop in ranking beginning around March 7 / 9. My guess is you'll see something similar. If I'm right about the March Google update, then there isn't anything wrong with your site. It's just that people aren't clicking on your site when they search for "polygraph" (0.3% CTR is rather low, as you can see compared to your other keywords) or Google feels your page isn't the most relevant to their query. You could try making a page on your site focused specifically on that keyword, but you'd be fighting against Wikipedia & Merriam-Webster for the niche.