What is the purpose of using a bloom filter in Redis?

Redis Bloom filter is a data structure used to quickly determine if an element exists in a set. It efficiently identifies whether an element may be in the set, but cannot guarantee that an element is definitely in the set or exclude that an element is already in the set. Bloom filters are typically used to reduce the number of queries to a database, saving resources and time. Common applications include web page caching, data deduplication, and crawler filtering.