Approval Engines - what does it actually do?

[SNNoob]

Hey!

So I came across a thing called Approval Engines in System properties. To solve a related issue regarding Flows, I'm considering to turn it off for sc_Req_item table. 

However, we also have A LOT of traditional flows. If this is turned off (I understand that it cannot be turned back on?) does it have an impact to existing Flows that relate to the table, beyond delivery plans? 

Can anyone of you smart people open up this thing to me beyond the info located in Docs? Are there risks involved with turning it off?

https://docs.servicenow.com/bundle/rome-servicenow-platform/page/administer/service-administration/c...

[bammar]

If you dont fully grasp what it does do not turn it off. Typically all Task related tables use the Approval Engine.  

If you find tat Workflow approvals dont work on a certain table it could be the approval engine is off. 

Also if you make a custom table and approvals are not working you would turn on approval engines. Thats as much as i know from experience.