Mobile-first indexing means Google evaluates your site’s mobile version for rankings. Backlinks still play a role, but mobile usability now affects their impact. A link to a page that loads poorly on mobile may pass less value. Google considers user experience in how link equity flows. Backlinks help determine authority and crawl priority. But mobile rendering must support the link’s destination. If a mobile page breaks or redirects oddly, trust erodes. Also, mobile users tend to interact differently. They click faster and expect cleaner layouts. Backlinks to mobile-optimized content have higher engagement. Google uses behavior metrics to assess link utility. Mobile-first indexing increases the importance of responsive design. Make sure linked pages display correctly across devices. Audit backlinks that point to desktop-only versions. Update internal links to support mobile-first structures. Backlinks remain foundational, but now they must serve mobile expectations.