Spam
The spam emails pretending to fix your SEO.
If an email starts by insulting your website, inventing a crisis, and promising page-one rankings, treat it like a beach vendor selling invisible sunscreen.
Common SEO spam uses vague warnings: your site has errors, your rankings are bad, your business is invisible, or your competitors are stealing traffic. Sometimes they attach a generic report that could apply to almost any website.
Real SEO work starts with context. What are your services? Where do you operate? Which customers matter? What is the current state of the website? Without those answers, nobody has diagnosed anything.
Do not give admin access to random senders. Do not install plugins they send. Do not pay for guaranteed rankings. Ask for a clear scope, a readable audit, and ownership of every account used for your business.