Yoast 5.0 introduces a text link counter to start off the newest big release and is the first implementation of looking at your entire site from a SEO perspective.
Search Engine Optimization (SEO)

Why Your Website Needs To Be Mobile Friendly
Since the dawn of smartphones, more and more people are accessing, and searching the internet via their mobile device. In fact, using the internet on a smartphone or tablet, has become more popular than accessing the internet on a desktop computer or laptop. More than half of all internet traffic now comes from smartphones and tablets.

Link Building
Internal and external link building are powerful page rank boosters essential to growing your website’s SEO and getting more exposure. SEO is a balance between having great technical practices and highly relevant content for users. Link building, when used properly, helps users and search engines navigate your website’s content easily.

Why is SEO so important?
Search Engine Optimization is an investment for the future of your business.