Maven phase

Maven have three lifecycles:clean default and site.
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**clean lifecycle**
it has three phases
pre-clean
clean:delete the project's build directory(default target directory)
post-clean

**site lifecycle**
it is concerned with generating documentation for a project.

**default lifecycle**
validate: validate the project is correct and all necessary information is available
compile: compile the source code of the project
test: test the compiled source code using a suitable unit testing framework. These tests should not require the code be packaged or deployed
package: take the compiled code and package it in its distributable format, such as a JAR.
integration-test: process and deploy the package if necessary into an environment where integration tests can be run
verify: run any checks to verify the package is valid and meets quality criteria
install: install the package into the local repository, for use as a dependency in other projects locally
deploy: done in an integration or release environment, copies the final package to the remote repository for sharing with other developers and projects.

Examples
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>>mvn clean install
it will first execute clean phase of clean lifecycle, the it will execute install phase of default lifecycle.