{keyword}';waitfor: Delay '0:0:5'--

The string you provided, {KEYWORD}';WAITFOR DELAY '0:0:5'-- , is a classic example of a payload designed to test for "Time-Based Blind SQL Injection" vulnerabilities. Technical Breakdown

: Use prepared statements so the database treats input as data, never as executable code. {KEYWORD}';WAITFOR DELAY '0:0:5'--

: If the website takes exactly 5 seconds longer to load than usual after this input, the attacker knows the application is vulnerable to SQL injection. The string you provided