Definition
A link from another domain to yours. Still one of the strongest ranking signals — when it comes from a site with real readers and topical fit.
A backlink is a vote that costs the voter something: space on their page, and their readers’ attention. That cost is what makes it worth counting. Search engines read links both as a path for crawling and as a measure of standing, which is why a single link from a publication that is itself widely cited can outweigh hundreds from sites nobody reads.
How it works
A crawler following a link treats it as a route to the target page and as a signal about it. The anchor text describes what the destination is about; the surrounding paragraph narrows that further; the linking page’s own standing decides how much the signal is worth.
Not every link passes that signal. A rel="nofollow", rel="sponsored" or rel="ugc" attribute marks the link as one the publisher does not vouch for, and search engines treat those as hints rather than endorsements.
The practical consequence is that counting links tells you almost nothing. Where they sit, who else that site links to, and whether a human would ever click them tells you most of it.
Why it matters in iGaming
Gambling is one of the sectors search engines police hardest, and link patterns are the main thing they police. A footprint that would pass unnoticed in an ordinary market — the same anchor text repeated across dozens of thin sites, links bought from a network that also sells to every competitor — is routinely caught here.
The other half is supply. Many publishers will not take gambling links at any price, so the pool of genuinely useful placements is small, slow to grow, and worth protecting. That scarcity is what makes the shortcut tempting and the shortcut is what gets sites filtered.
Example
A sportsbook earns a link from a national newspaper’s sports desk, inside an article about how odds move before a cup final. One link, in context, from a site with its own readership. It outperforms a batch of fifty links from betting blogs that exist only to sell them — and it keeps working after the next core update, because nothing about it was bought.
Common mistakes
- Counting links instead of judging them. A report showing a rising number of referring domains says nothing about whether those domains have readers, and a dashboard metric is not a ranking.
- Buying from a network that sells to everyone in the vertical. The resulting pattern is identical across competitors, which is precisely what makes it detectable.
- Pointing every link at the same page with the same anchor. Natural link profiles are uneven; a perfectly optimised one is a signature.