Support
Support is an area below current price where buyers have previously shown interest. If price returns there, it may react—but it can also break through.
Resistance
Resistance is an area above current price where selling previously appeared. It can slow a move, but a strong trend can also move through it.
Mark zones, not magic numbers
Use a small area around prior highs, lows, or periods of heavy trading. Exact lines can create false precision because markets rarely turn at one perfect number.
Beginner takeaway
Use support and resistance to plan what you will watch. Let price behavior decide whether the area is holding or failing.