Block Validation Process, in Terms of adding Block to the Chain

quick question – How does a Node react to a new block propagated to the network?
In Terms to does a Miner stop mining when “he” gets information of a new block to validate it? or does it not stop and validate it in another Thread?

If the Question is unclear – let me know I just began my deep dive into the technical side of Crypto and Blockchain :]

best regards :]