Retrieval cues help access memories
Retrieval cues are stimuli that help you access stored memories. The encoding specificity principle states that memory is best when the cues present at retrieval match those present at encoding. This is why context matters: studying in the same environment or with the same cues can improve recall.
Example: studying for an exam
If you study for a test in a quiet room, you might recall better if you take the test in a similar quiet environment. The environmental context acts as a retrieval cue. Similarly, if you learn a fact while listening to a specific song, that song might later trigger the memory.