How can the optimization score be used to help increase

It can show how close a campaign is to being optimized to its full potential.
It helps you determine a website’s network performance and find ways to optimize it.
It lets you compare the popularity of your website to others so you can know your market share.
It lets you compare ad text creative with other ads and find ways to make them more effective.

The correct answer is:

It can show how close a campaign is to being optimized to its full potential.