To carry out an effective SEO strategy for mobile and desktop, you should always make sure that the URL structure is well defined, that it is not duplicated, that they are easy to understand by search engines and that they avoid redirecting to duplicate content.It is important to use the alternate and canonical tags to indicate the pages corresponding to the version or / and display language, as well as avoiding duplicate content.Of course with Topper the problem does not arise .. he thinks about it! Art. id:31 | https://www.toppersystem.com/extra_information.php?lang=en