Usage cases

I manage several sites with this drop in via WPengine. I notice significant increases in queries and other much faster responses without making any specific changes to our code, loops, WPquery, ect… but I want to make sure I am taking advantage of all its benefits.

For example, can you elaborate on the following usage scenarios, or point me in the direction of a technical implementation guide for the following:

• Do I need to change the way I write custom queries to use this plugin and take advantage of its features?
• Once installed and running does it “automatically” cache the DB or do I need to trigger it somehow?
• When developing plugins or themes (other than WP standards) are there any additional standards or features I should develop into the theme to take advantage of this cache? For example, adding an option to the admin panel to allow users to ‘turn on or off’ the cache on various TAX or CPT queries…
• Is there a more detailed guide somewhere?

Thank you for your consideration in this matter.