unit tests maven code example

Example: difference between running test from maven vs runner class

What is the different between running a test from maven 
and cucumber test runner class?

In my project I use cucumber + Junit. to generate reports, 
I use maven-cucumber-reporting.
This report is only generated when I run my test as a maven 
lifecycle verify. Becuase this is how it works according to
its configuration. 
So if I run my test from runner file, it does not trigger
the maven lifecycle. It only runs that test. In order to
run any maven lifecycle we have to run as a maven command 
which starts with 'mvn'.