Caching in continuous integration (CI) is crucial for achieving reliable and fast build processes. It involves storing frequently used resources or outputs to avoid repeated work, leading to shorter build durations and improved workflow efficiency. Two types of caching are explored: dependency caching and build caching. Dependency caching reduces the need for repeatedly fetching unchanged dependencies from the network during builds by storing them in a cache with unique identifiers. Build caching, on the other hand, stores outputs of intermediate build steps, like compiled code or test results, for reuse in subsequent builds. Both types of caching can benefit large projects and teams, reducing CI build times, local build times, resource consumption, and improving developer productivity and morale. The choice between dependency caching and build caching depends on various factors, including application complexity, dependency manager behavior, build frequency, network performance, and types of dependencies.