I'm reading the Mastering Bitcoin 10th chapter, and quote
Similarly, a mining pool will set a (higher and easier) pool target that will ensure that an individual pool miner can find block header hashes that are equal to or less than the pool target often, earning shares. Every now and then, one of these attempts will produce a block header hash that is equal to or less than the Bitcoin network target, making it a valid block and the whole pool wins.
- I'm wondering what's the point to set a higher target value? If the pool ask the miners to search the same space wider than the Bitcoin network target, some of the miners' work are wasted for sure.
- How does the mining pool split the work?