Here are few pieces of advice from Google:
- Just like modern browsers, our rendering engine might not support all of the technologies a page uses. Make sure your web design adheres to the principles of progressive enhancement as this helps our systems (and a wider range of browsers) see usable content and basic functionality when certain web design features are not yet supported.
- Pages that render quickly not only help users get to your content easier but make indexing of those pages more efficient too. We advise you follow the best practices for page performance optimization, specifically:
- Eliminate unnecessary downloads
Many might have also received messages from Google requesting you to allow access to the key areas and it specified that not allowing it to crawl could harm your search engine rankings. Here is the warning message sent out by Google:
Thus, if you own a business or a tier 4 data center and also want to rank better in search engines then you must adhere to Google advice.