Why/When should I mark my discussion as CORRECT ANSWER and/or Helpful?

One of the strongly recommended best practices for this Community is to mark your discussion replies as CORRECT ANSWER and/or Helpful when applicable. You may ask, when and why should I mark my discussion in this manner?

Why should I mark my discussion as CORRECT ANSWER and/or Helpful when applicable ?
     Here are some of the few reasons for marking a discussion as CORRECT ANSWER and/or Helpful when you have opportunity to do so:

• Helps other community members identify which responses progressed or solved the issue.
• Lets those who provide responses know that the issue is solved and no further correspondence is necessary on this thread.