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An update to the mobile-friendly algorithm

Starting today, pages with an app install interstitial that hide a significant amount of content on the transition from the search result page won’t be considered mobile-friendly.

Instead of full page interstitials, we recommend that webmasters use more user-friendly formats such as app install banners. We hope that this change will make it easier for searchers to see the content of the pages they are looking for.

Happy searching!
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Nick A
It's great to have a company with enough pull like Google to encourage sites to treat their visitors right.
* cough * Yelp * cough * (and many others)
Every kid, teen, student, professional, labor even every single person in this world is aware to awesome and transparent efforts of globally named community GOOGLE. Personally Thanks to GOOGLE. I must request to name GOOGLE case sensitive. 
Thank you, Google! I'm so happy about this change. I'm trying to remember a time when I got hit with that interstitial and thought "Oh thank goodness, I can download their app rather than suffer through getting the content I just clicked on."  Yeah, that would be NEVER.
Alex B
Good to see Google using their powers for Good
Now if only we could get the same treatment for websites that continue to ask you to download their app no matter how many times you say no. I'm looking at you Twitter.
Google has always been strict against using interstitials and never said that this is user friendly. It gave enough time to the websites to remove and now it is taking action against these websites that is completely justified.
Is the rule for interstitials just for ads? I'd really like to see those "Sign up for our Newsletter Right Now Even Though You've No Idea Who We Are Yet" modals disappear too.
+Gee Ranasinha  I am not expert but I dotn think this is applicable to anything different from app install only, Still I would love some expert to come up and make it clear..
Let's get rid of those full page popups that ask you to subscribe to newsletters. I'm looking at you +Neil Patel 
Hi +Google Webmasters  What do you mean by Hide a significant amount of content ? if it is a 320x480px interstitial, what maximum size could we use? Thanks
Hopefully websites just remove those annoying interstitials. They bring no value and make me hate them.
+Bryson Meunier I clicked on your link and began to read your article. About 3 seconds into me reading it the screen turned dark and an interstitial covered up the article I was reading. I'm writing this to give you feedback that it annoyed me. I closed your tab. Consider removing it. I mean how many people do you think you're converting to go to your conference? Take that number and find out how many ppl are annoyed by it. Is it worth it?
Thank you! Good to see google detecting and playing js better.
Does this only apply to App install interstitials or would this also apply to a pop-up for, say, signing up for e-mail? I'm confused. Hope someone at Google will clarify this.
+Brice André The correct answer is "use a fucking banner".

If you want the user to see it when they open the page, put it at the top of the damned page. But let them scroll past it.

On far too many mobile devices, you simply cannot get past interstitials. For anyone who's challenged visually, they're a huge pain in the ass. If someone's mobility challenged (Parkinsons or similar health issues), closing a dialog may be hit-or-miss. My 10" tablet is fucking ridiculous for registering tap events far from where they were intended (I have no visual or motor issues, this is just the device).

Increasingly, browsers are incorporating "reader mode" options which strip all site design. If I see any crap that gets in my way (interstitials, flyovers, popups, fixed headers, menues, or sidebars, even just multi-column design), I reach straight for that.

On the Web, client ultimately determines presentation. Remember that.
I'd love to see Google's full Mobile guidelines. I'd like to suggest:

* No fixed headers, footers, or sidebars.
* No fixed font sizes.
* No presumed viewport or body widths.
* Maximum values set for main body text, ~50 em or so.
* Toggleable contrast, day/night modes.
+Brice André​ I've come accross some sites thay use banners PLUS you have the option to close that banner so, those pop ups are not necessary.
It is annoying when you click on a link to read some article and the first thing you get is a pop up that cover the whole page asking you to install the app or sign-up. Some websites are so horrible designed that the freaking box is impossible to close.
That's interesting

Yet I've just testing mobile-friendly sites with various different test result

No programming skill do I have

Hopefully my testing habits can somehow help webmasters

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