Recently Google disclosed the seven most common mistakes they have come across when webmasters make their websites mobile-friendly. You have less than a month to make your sites mobile-friendly so get to it now!
Some types of videos or content are not playable on mobile devices, such as license-constrained media that require Flash or other players that are not broadly supported on mobile devices. Unplayable content, when featured on a page of any website can be very frustrating for users.
If you have separate mobile URLs, you must redirect mobile users on each desktop URL to the appropriate mobile URL. Redirecting to other pages (such as always to the homepage) would be incorrect.
To ensure the best user experience, if you recognise a user is visiting a desktop page from a mobile device and you have an equivalent mobile page at a different URL, redirect them to that URL instead of serving a 404 or a soft 404 page. Also make sure that the mobile-friendly page itself is not an error page.
APP DOWNLOAD INTERSTITIALS
Many webmasters promote their business’ native apps to their mobile website visitors. If not done with care, this can cause indexing issues, and disrupt the visitor’s usage of the site
A common practice when a website serves users on separate mobile URLs is to have links to the desktop-optimised version and likewise a link from the desktop page to the mobile page. A common error is to have links point to an irrelevant page such as having the mobile pages link to the desktop site’s homepage.
SLOW MOBILE PAGES
It is very important to make sure your mobile site loads quickly. Users can become very frustrated if they have to wait a long time to see your content.