The Fetch as Google feature in the Google Search Console rocks, it shows you how GoogleBot sees your web site or app. It can visually give you a clue into crawling issues.
But often webmasters get a notice that GoogleBot was only able to do a partial crawl and that can be scary. The thing is, the partial crawl is accompanied by a green checkmark, symbolizing everything is okay. The truth is, probably everything is okay.
It looks like this:
Gary Illyes from Google said on Twitter that it is probably okay to ignore it when you can look at the preview and see your whole web site. Gary wrote, "if you can see the actual content in the rendered version and it looks OK, I would disregard the partial thing."
Here is the tweet:
@serbayarda if you can see the actual content in the rendered version and it looks OK, I would disregard the partial thing.
— Gary Illyes (@methode) October 14, 2015
Sometimes ads and other elements are blocked and that is often okay.
Forum discussion at Twitter.