{keyword}') And 7365=convert(int,(select Char(113) Char(98) Char(113) Char(118) Char(113) (select (case When (7365=7365) Then Char(49) Else Char(48) End)) Char(113) Char(113) Char(98) Char(113) Char(113))) And ('armv'='armv Link

The AND ('aRMv'='aRMv at the end is used to balance out the remaining syntax of the original query so the site doesn't crash or show a standard error.

The CASE WHEN (7365=7365) is a "True/False" test. Since it’s true, it returns CHAR(49) (the number 1). If the database processes this and returns a "1" or a success message, the person running the code knows the site is vulnerable. The AND ('aRMv'='aRMv at the end is used

In plain English, this specific string is designed to test if a database is vulnerable by forcing it to perform a logical operation and return a specific result. The AND ('aRMv'='aRMv at the end is used

It uses ') to try and close an existing data field so it can start running its own commands. The AND ('aRMv'='aRMv at the end is used