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

# Scans

> How Atlios checks a Shopify catalog and turns results into reviewable work.

A scan is an Atlios review of your Shopify catalog and storefront signals.
It checks product data, variant data, image coverage, duplicate identifiers,
and storefront rendering signals, then records the results for your team to
review.

Scans are point-in-time snapshots. They show what Atlios found when the scan
ran, not a live stream of every product change.

## When scans run

Atlios runs scans for you, so you do not have to start them:

* A first scan runs automatically when you connect a store.
* Scheduled scans run on a cadence that depends on your plan.
* Individual products are re-checked automatically when they change in Shopify.

See [How your catalog stays current](/concepts/scan-freshness) for the full
cadence, and [Collection launch readiness](/workflows/collection-launch-readiness)
for reviewing a product set before a launch.

## What a scan produces

A scan produces issues. Each issue groups a catalog or storefront problem into
something a person can review, prioritize, suppress, or fix. For how findings
become reviewable work, see [Scans and issues](/product/scans-and-issues).

## Keeping results current

You do not re-scan by hand. Atlios re-checks a product automatically after it
changes in Shopify, and the scheduled scans refresh the full catalog on a
cadence, so the issue list keeps pace with edits and applied fixes.