Memcache is an open source, high performance distributed memory caching system that makes websites and web applications run faster. It is often used to speed up dynamic database-driven websites by caching data and objects in RAM to reduce the number of times an external data source (such as a database or API) must be read. Memcache reduces latency and improves the response time of web applications by allowing you to store objects in memory, and quickly access them without having to query the database. With support for multiple languages and platforms, Memcache is a great solution for developers who need fast, reliable performance and scalability.