SEO Resources Vol.7
It’s important to distinguish between “mobile friendly” for ranking and “mobile index” for relevance. While the weights of “mobile friendly” may change, it’s not the same concept as a mobile index. A site can be in the mobile index without being mobile friendly.
Understanding and using the difference between external and internal links strategically as part of your overall digital marketing plan is an important part of SEO. Each type of link has its place in a strategic SEO plan aimed at boosting your position on the search engine results page.