Device targeting is important nowadays since most of the users are using mobile devices to browse the web. Use device targeting to reach your best customers on any device. With device targeting, you can customize your ads for different mobile devices and operating systems. This way you can target people who are online on mobile devices or using different operating systems.
The errors in technical SEO are often not obvious, and therefore one of the most popular. Mistakes in robots.txt and 404 pages, pagination and canonical URLs, hreflang tags and 301 redirects, http vs https and www vs non www versions: each of them can seriously spoil all efforts to promote the site. One quality SEO website analysis is enough to solve all the main problems in this part forever.