What does the crawl actually check?+
It's DataForSEO's OnPage crawler, the same engine agencies license directly. It reports what's on your live pages: response codes, redirect chains, canonical and indexability issues, duplicate or missing titles and descriptions, duplicated body content, and broken internal links.
Do I need Google Search Console?+
No, the crawl runs without it. Connecting GSC adds your own query, position and impression data alongside the crawl, so you can see which pages the issues are actually costing you. It does not change how the audit orders its findings — that is still by severity.
Is this a content audit or a technical SEO audit?+
Both, because the split isn't real. The crawl reports the technical state of your live pages, and the Search Console data tells you which of those pages are worth editorial attention. If a page needs rewriting rather than repairing, it opens straight into the Content Editor with targets from the live SERP.
How big a site can it crawl?+
It runs across the whole domain rather than URL by URL, and the price you're shown before the run scales with the size of the crawl, so a large site is a larger number on the confirmation, not a silently truncated report.
Does opening an old audit cost anything?+
No. Every audit is saved the moment it runs, and re-opening it reads the stored result. Only pressing Run buys new data, and you see the price before you press it.
How often should I re-run it?+
After you've shipped a batch of fixes, rather than on a schedule. Runs are never overwritten, so a fresh crawl sits next to the last one and you can see exactly what moved.
Will it fix things for me?+
No. It tells you what's wrong, why it matters and what the fix is. The change still happens in your CMS or your codebase. Anything that edits your live site without you seeing it first is a worse deal than it sounds.
Can I keep client sites separate?+
Yes. Each domain gets its own workspace, and audits, documents and visibility runs are filed against it, so nothing from one client's site turns up in another's report.