A controlled attack on your own system by specialists who attempt to break in the way a real attacker would, ending in a report of exploitable weaknesses ranked by impact.
Automated scanners find known vulnerabilities; a tester finds the logic flaws that matter — the parameter that lets one user read another's invoices, the endpoint that forgot its permission check.
We prepare the system and scope the engagement, fix findings by severity with a retest afterwards, and treat recurring categories as a process problem, adding checks that prevent the same class from returning.