Smartphones are everywhere, and Google knows it. If your website isn't easy to use on a smartphone, it won't rank well in search results. For success, your site must be mobile-friendly, ensuring fast loads and easy navigation. But why is a mobile-friendly test important?

Google (since its mobile-friendly update in 2015) and other search engines now primarily use mobile-first indexing, meaning they crawl and index the mobile version of a website first. If your site isn't mobile-friendly, it may not rank as well in search results.

A mobile-friendly website provides a better user experience for visitors on smartphones and tablets. This can lead to lower bounce rates, longer time spent on the site, and increased engagement—all factors that search engines consider when ranking sites.

Mobile-friendly websites are usually optimized for faster loading times on mobile devices, which means making sure images in particular are resized appropriately, for example. Page speed is a significant factor in SEO rankings, and mobile-friendly designs can help improve load times, which also enhances crawlability of the website.