Safety play in contract bridge is a generic name for plays in which declarer maximizes the chances for fulfilling the contract (or achieving a certain score) by ignoring a chance for a higher score. Declarer uses safety plays to cope with potentially unfavorable layouts of the opponents cards. In so doing, declarer attempts to ensure the contract even in worst-case scenarios, by giving up the possibility of overtricks.
Elimination play (endplay)
The "throw in" or "elimination" is a technique that is needed for very often and everyone should be familiar with it.
If you execute a successful throw instead of a losing finesse and spread your cards youll feel great.