The reading means you still have a bit of sugar left in the beer. If this is a kit, the instructions MAY tell you the expected final gravity (FG). If you know the expected FG, and if you are at the expected FG, you may be tempted to bottle now; DON'T do it.
The expected final gravity is an estimate. Wait for the real FG before you transfer to secondary or bottle! To find the real FG, take a hydrometer or refractometer reading, wait three days and take another reading. If the readings are the same, you have reached final gravity and can safely bottle the beer. If you bottle before you reach final gravity, the sugar remaining in the beer plus the priming sugar can produce enough CO2 to explode the bottles. From experience: exploding bottles can hurt and can require a visit to the ER.