The Core Distinction: Object vs. Attribute
A backlink is a hyperlink on an external website that points to a page on your site. It is a concrete, countable object — you can list every backlink in a crawl report, see its anchor text, and verify whether it is live. Link equity, by contrast, is an attribute carried by that backlink: the amount of ranking authority the link transfers to the destination page.
The relationship is one-directional in causality. Backlinks exist first; link equity flows through them second. A page can have thousands of backlinks and accumulate very little link equity if those links come from low-authority or irrelevant sources. Conversely, a single backlink from a highly authoritative, topically relevant domain can transfer substantial link equity.
Think of a backlink as a pipe and link equity as the water flowing through it. The pipe is either there or it is not. The water pressure — volume, quality, velocity — depends on conditions at the source and along the route.
How Backlinks Are Evaluated as Links
Search engines assess backlinks on several binary or near-binary factors before any equity calculation begins. First, is the link crawlable? A link blocked by robots.txt or rendered only in JavaScript that Googlebot cannot execute transfers no equity regardless of the linking domain's authority. Second, does the link carry a rel='nofollow', rel='sponsored', or rel='ugc' attribute? Google treats nofollow as a hint rather than a directive, but sponsored and ugc attributes signal that the link should be excluded from equity transfer.
Third, is the linking page itself indexed? A backlink on a de-indexed or penalized page contributes nothing. Fourth, is the link placement contextual — embedded in body content — or is it a footer or sitewide link? Sitewide links from a single domain are typically consolidated by search engines into one signal rather than counted multiplicatively.
These binary checks happen before equity calculations. A backlink that fails any of them does not enter the equity pipeline at all. Ecommerce operators auditing link profiles must clear these filters first before drawing conclusions about equity.
How Link Equity Is Calculated and Distributed
Once a backlink passes the crawlability and attribution filters, link equity calculation begins. The equity a page can pass is a function of the linking page's own accumulated authority, which is itself the product of all the links pointing at it. This is the recursive nature of PageRank-style algorithms: authority is not self-generated; it flows in from the wider web.
That equity is then divided among all outbound links on the page. A page with 200 external links dilutes its equity across all of them; a page with 3 external links concentrates equity. This is why a backlink from a resource page crowded with hundreds of outbound links is worth less than a contextual editorial link on a page with minimal outbound linking.
Link equity does not stop at the directly linked page. It flows through internal links to other pages on your site. An ecommerce category page that earns a strong editorial backlink should be internally linked to its product pages deliberately, so equity propagates to pages that generate revenue.
Where the Two Concepts Diverge in Practice
Backlink count and link equity are not correlated metrics in any simple ratio. A site can grow its backlink count through directory submissions, low-quality press releases, or forum profiles and see no improvement in rankings because those links carry negligible equity. Chasing backlink volume without assessing equity transfer is one of the most common misallocations of SEO budget in ecommerce.
Link equity is also affected by factors that have nothing to do with the backlink itself. If a well-linked page on your own site is poorly internally linked, equity from its backlinks stalls there instead of distributing to deeper pages like product detail pages. A backlink audit that only counts links misses this internal distribution problem entirely.
Reporting on the two metrics requires different tools. Backlinks are enumerated in crawl data from tools like Ahrefs, Majestic, or Google Search Console. Link equity is approximated through authority scores and flow metrics in those same tools, but the approximation is a model — not a direct measurement Google exposes. Treat equity estimates as directional signals, not precise values.
When to Use Each Term and Why It Matters Operationally
Use the term 'backlink' when discussing acquisition: outreach campaigns, digital PR, competitor gap analysis, or disavow decisions. A backlink is the unit of work in link building. You earn backlinks; you do not directly earn link equity — equity is a consequence of earning the right backlinks.
Use the term 'link equity' when discussing site architecture, internal linking strategy, and the downstream impact of earned links. Questions like 'does this new backlink actually help our product pages rank?' or 'why does our homepage rank but our category pages do not?' are equity questions, not backlink questions.
For ecommerce specifically, the operational consequence is this: link building and site architecture are not separate workstreams. Every backlink earned creates an equity pool that internal architecture either distributes efficiently or wastes. Treating the two terms as synonyms leads to campaigns that build links to the homepage while leaving high-margin category and product pages starved of authority.