Support is a price area where buying interest has previously helped slow or stop a decline. Resistance is an area where selling interest has previously slowed or stopped a rise.
They are zones
Support and resistance are not guaranteed exact prices. They are zones inferred from prior highs, lows, consolidation areas, and sometimes psychological price levels.
Use with context
A level becomes more informative when considered with trend, volume, time frame, and risk. A price crossing a level does not guarantee a successful reversal or continuation.