Thanks for the all great tips and instructions. I have taken them into account (of course the one I could) and my website did improve its ranking. 

In Google Analytics I was able to see that more traffic came from organic search, not from social media pages where I usually share my material.

I like that Answer Box feature, so my next goal is to try to put some of my content there.

Also regarding the task, I found a certain search on Google, where organic placement was even above Snippet box (there were no paid ads).