Google's 4/21 update is expected to have major negative
effects for webmasters who've failed to make their sites
mobile-friendly. But because many of the errors causing
sites to perform poorly on mobile devices are easy to fix,
there's still time to get your site ready for the deadline.
Take Google's Mobile-Friendly Test
This tool will quickly give you an indication of whether you
have to worry about the 4/21 deadline. If you pass it with
flying colors, you won't suffer on 4/21, and can proceed
safely to step 6. If not, go to step 2
Use the "Fetch as Google" feature to check for:
This will let you see how the Googlebot sees
and renders your content.
Blocked Image files
If you use separate URLs for your mobile pages, make sure to
test both the mobile and the desktop URLs, so you can confirm
that the redirect is recognized and crawlable.
Check your content to make sure
it's playable on mobile devices.
Use HTML5 for animations, not Flash. If you're embedding videos,
make sure they're playable on all devices.
Check your redirects.
Again, use Webmaster Tools, which will easily let you see
whether the way you've configured your URLs leads to faulty
redirects or other smart phone crawl errors.
Check for app download interstitials,
which are often used to prompt
users to download an app.
Google's recommendation is to use
a simple HTML banner or image
that links to your app store.
Check your site's performance on mobile
devices using Google's Page Speed Insights
Page Speed Insights (part of Google's Webmaster Tools) will include
detailed diagnostics that will let you identify problems slowing down
Consider giving your site a
Use browser-caching and image
compression to reduce load time. Get rid
of installed but unactivated WordPress
plug-ins -- doing this can make your site
faster as well as more secure.
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