Internal links — links from one page of your store to another — do three jobs at once. They handle discovery: crawlers find your pages by following links, and a page nothing links to may wait weeks to be crawled or never make the index at all. They route authority: ranking strength accumulated by your strongest pages (usually the homepage and anything that has earned outside links) flows through links to the pages they point at. And they provide context: the anchor text — the visible, clickable words — tells search engines what the destination page is about, in your own words.
Most Shopify stores get the first job partly done through navigation menus and leave the other two on the table. The store sells adjustable dumbbells; the blog has a well-researched post about training in small spaces; the two never link to each other. That missing link is free ranking signal — no new content, no tooling, just a decision about structure. This guide is a plan for making those decisions deliberately.