You can use this option to delete some files related to the applications.
In the Maintenance pane, select the Applications checkbox, then click the Options button to access advanced settings.
Applications cache: You can use this option to remove the applications cache files. The deletion of these files recovers some space and prevents a damaged file from impacting computer functions.
You should use this command occasionally. A slight temporary decrease in speed will be observed.
Saved application states: When you quit an application, its state (open windows, their sizes, and positions) is automatically saved, unless you select the "Close windows when quitting an app" checkbox in the General pane of System Preferences.
Audio Units plug-ins cache: Audio Units are plug-ins that can be used to process audio by applications such as Final Cut Pro X, GarageBand, Logic Pro X, and MainStage. You can use this option to delete the cache files of these plug-ins.
Java and Java Applets cache: Java temporarily stores applications and applets from webpages you visit that use the Java plug-in. You can use this option to clear the cache of those files so that new versions are downloaded when the pages are revisited. This can resolve some issues when the cached files are out-of-date.