About 2 months ago my website dropped in Google from SERP 6 to approx. 36 after I changes some alt tag descriptions. I cannot seem to regain my first page ranking. I have heard about the -30 penalty. Is that a real thing?
Also, something I have noticed is, if I change the website title and H1 tag from "Blue widgets, didgets, and gidgets" to "Blue widgets" my website disappears all together. Does it take some time for Google to re-index the site after changing the page title or is it being penalized?