What counts as one operation with ATC?

I’m confused on what 1 operation counts as. Does 1 count as 1 response to an aircraft or does it count as how many shifts you take as an ATC?

An operation is a clearance (e.g. on Approach freq, clearing someone for approach would count as an operation).

Here’s the definition of an operation.

Wait, so I cleared like roughly 10 planes at EGLL and I ended the session and I looked and it hadn’t been updated, what can explain that though?

Your ops do count on the TS. That said, it can take a little time for the server to reflect those on your account. Be sure you properly end session, close and relaunch the app from time to time for your stats to properly show. Good luck!