Domain Authority

A longer, more detailed piece aimed at the same phrase routinely loses to a shorter one on another site. Comparing the pages explains nothing, because the reason isn't in the page — it's in the site the page sits on.

The trouble is that search engines don't publish how they make that judgment. The ranking calculation isn't visible from outside, and no number gets handed out for whole-site trust. So third-party tools started building something similar out of the link data they collect and publishing it as a score.

Domain authority is that estimate. It comes from a tool rather than from a search engine, and that single fact determines how the number can be used.

The raw material is links pointing at you from elsewhere. The count of backlinks — links other sites have made to your pages — the score of the sites that made them, and whether those sites are in a related field all go into the calculation.

Three properties matter.

1. Links aren't equal. One link from a high-scoring site outweighs a hundred from low-scoring ones, which is why work that only raises the link count barely moves this number.
2. The scale isn't even. It runs 1 to 100, and each step costs more the higher you go, so 20 to 30 and 70 to 80 are very different amounts of work.
3. Tools disagree. The same site can read 42 in one tool and 58 in another, because each one crawled a different set of links.

That fixes how to use it. Don't target an absolute value; pick one tool and compare against competitors inside it. If you're at 34 and the site you want to outrank is at 61, the read is that the same phrase isn't winnable right now, which sends you to less contested phrases first.

Worth remembering alongside that: this score is not an input to ranking. Use it to predict positions and it will be wrong often.

"We're at 34 and they're at 61. We can't take that phrase right now."

It's being used to choose which competitors to take on.

"The work isn't raising domain authority, it's earning links."

The score is an output; the material is what you touch.

"We switched tools and the number changed."

Different tools hold different data and land on different values.

On the Pagedeck blog, Ravi looked at this score while choosing which phrases to target. Phrases where all five top results scored above 60 went to the back, and he started with the ones that had sites in the 30s among them.

The reasoning was one line: a post that reaches third place brings traffic, and the same effort spent landing tenth brings almost none.