Maven dependency scopes:

Maven provides four dependency scopes:

• compile: A compile-scope dependency is available in all phases. This is the default value.
• provided: A provided dependency is used to compile the application, but will not be deployed. You would use this scope when you expect the JDK or application server to provide the JAR. The servlet APIs are a good example.
• runtime: Runtime-scope dependencies are not needed for compilation, only for execution, such as JDBC (Java Database Connectivity) drivers.
• test: Test-scope dependencies are needed only to compile and run tests (JUnit, for example).