What is difference between term "selector strategies" and term "Locator strategies"


Hi All,
I gone through terms “selector strategies” and term “Locator strategies” while reading appium.
But unable to understand diff. between them.
selector strategies : http://appium.io/docs/en/commands/element/find-elements/
Locator Strategy: https://appiumpro.com/editions/8


They both are same, people use terminology interchangeably.

In case you’ve started learning appium, you can refer to my blog https://vikramviknowledgesharing.wordpress.com/2017/01/01/appium-mobile-automation/ , where I’ve complied loads of info from last 4+ years of learning with appium