You’re look at mining pool herd mentality or divergence.

Mining pools make block templates for miners. They send them to miners as what we call jobs. Miners don’t want to hash the whole block - only just enough of the block that it rewards them bitcoin - so they hash the block header which contains a Merkle root. This merkle root changes when the block template changes and can be used to verify a tx is present in a block with JUST a branch of the Merkle tree (which is a binary tree … so a branch size is the log of the number of txs). Because the miner spends the coinbase to the mining pool, and the coinbase is used as an extra nonce (something to mutate the hash of the block header in the hopes it’ll have enough zeros at the front when hashed), the mining pool job contains a Merkle branch that the coinbase can be added to to compute a Merkle root. So this is a visualization of the Merkle branches mining pools are sending their miners. If they’re identical they are coordinating.