What does Backdoor Flush mean in poker?

Backdoor Flush in poker is a flush that does not come together right away, but is completed by hitting two needed cards in a row on the turn and the river. On the flop, there is no made flush draw yet, but the chance to make a flush still exists.

How does it work?

For example, a player may hold two spades, while the flop contains only one spade. At that point, the hand is still far from a flush. But if another spade comes on the turn and one more arrives on the river, the hand becomes a Backdoor Flush.

This kind of draw is weaker than a regular flush draw because two specific cards still need to come. The odds are lower, so building a big plan around it alone is risky. Still, Backdoor Flush matters in poker because it adds extra potential to a hand and can sometimes affect the decision to continue in the pot.