Welcome to the Q&A Forum

Hi there! While it is rather peculiar for this statistic to have jumped so rapidly, it looks to be stemming from a more extensive indexing of the site's internal links, which you can see here: https://moz.com/researchtools/ose/comparisons?site=www.propchill.com I can't necessarily speak to why all of those internal links were indexed this time around, but I do hope it helps to clarify where those links were being found!