I’ve been scanning all my paperwork I have collected for YEARS so I could toss out the paper copies and go to digital copies for reference if I ever needed. I just looked up an old document I made on Google drive which happens to be the place I decided to store my scanned documents. Now these are PDFs but basically photos. No optical recognition used in the scan. Google parsed every PDF and used OCR on them because when I search for stuff some of those PDFs with matching words come up in the results. I tested a couple words that would only be in the PDFs scanned. Sure enough they came up. So that means Google is performing an index scan and using OCR technology to parse the files for relevant and useful information on anything you upload to Google Drive. In one way this concerns me, mostly because I didn’t know, though I should have assumed it. This as a side benefit that is really useful for me because I scanned over 2300 documents and didn’t title them or sort them (yet) so being able to search is very beneficial.