The Shared Access Layer, or SAL for short, provides a consistent, cohesive API to common plugin tasks, regardless of the Atlassian application into which your plugin is deployed. These common services include, but are not limited to:
- Job scheduling
- Internationalisation lookups
- Persistence for plugin settings
- A plugin upgrade framework
SAL is a component of the Atlassian plugin development platform, as described in the Developer Network.