What is Israel's Roof Knocking tactic Does the IDF warn the civilians before attacking

Does the IDF warn the civilians before attacking? Watch IDF roof knocking in action used to clear out a building before a tactical strike on Hamas' internal security forces in northern Gaza.
roof-knocking tactic: a warning to civilians before attacks, Israel's "roof-knocking" tactic is probably the most terrifying heads-up you'll ever get, a preliminary explosion to tell a building's occupants the real rocket is just a minute behind.