> ## Documentation index
> Fetch the complete documentation index at: https://rankfield.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Data FAQ

> Answers to common questions about Rankfield's Site Strength, referring domains and web graph data.

## Why is a domain missing?

It is not in the current web graph release, so the API answers `200` with `"inGraph": false` and zeros. That does not mean the domain is offline or has no links: our crawl data may not include a page that links to it.

## Why is `referringDomains` null?

The domain is in the graph, but its count was unavailable for the lookup. `null` keeps "unknown" apart from a measured zero.

## Why is `topReferrers` empty?

There is no detail for this domain in the index. It does not prove that no site links to it.

## Does a higher Site Strength mean more traffic?

No. It describes link evidence in the graph. It does not estimate visits, rankings or conversions.

## Can I compare Site Strength with Moz or Ahrefs?

Not directly. Those scores use their own indexes, scales and methods. Compare Rankfield scores with each other.

## Does the web graph see every link?

No. It records the links on the pages that the crawls behind it fetched, so counts and lists can be lower than a full backlink index.

## How often does the data change?

When a new web graph release is built from newer crawls and loaded. Check [Get Dataset Status](/docs/data/get-dataset-status) for the release in use.