Pebble helps in storing information on computers, kind of like a high-speed filing cabinet. It's designed to work really well with a specific computer system called CockroachDB. Pebble takes some ideas from other storage systems like LevelDB and RocksDB, which are known for being fast and reliable.
It uses clever tricks to organize data efficiently, like grouping information into blocks and using filters to quickly find what you need. Pebble doesn't try to do everything RocksDB does, though. It focuses on just the things CockroachDB needs, like handling different types of data and keeping everything running smoothly.