The consequences.
WHAT ATTACKERS DO
Insert hidden links or redirects Upload files used to send spam Add pages selling unrelated goods Steal data Install a means of returning later
THAT LAST ONE
The reason cleanups fail.
Removing the visible damage without closing the entry point means it returns.
WHAT IT COSTS YOU
Your site, until it is cleaned Search visibility, if flagged as harmful Your email reputation, if spam was sent Customer trust Time and money to resolve
THE SEARCH FLAG
A site marked as harmful shows a warning to every visitor.
That damage persists after cleaning until review.
THE EMAIL CONSEQUENCE
Spam sent from your account gets your server blacklisted.
Your legitimate mail then fails.
FOR SHOPS
Stolen payment data is a serious matter with obligations attached.
WHAT TO UNDERSTAND
The cost is far higher than the cost of prevention.