Glossary
Execute
In one line: The whole team entering a site together, with utility thrown at the same time.
What it means
An execute is the moment the attack stops gathering information and commits to a site: smokes on the angles the defense uses to watch, flashes to blind, mollies on common hiding spots, then the players go in, in order. All within a few seconds.
A good execute has a clear order (who throws what, who goes first, who carries the spike) and precise timing: utility too early fades before anyone enters, utility too late leaves players walking in exposed.
An example
On a site with two entrances the team gathers in main. The controller throws two smokes, the initiator a flash, the duelist goes in and the others follow. Eight seconds later the site is taken and the spike is already down.