NiceHash is the largest hash power broker marketplace that connects sellers or miners of hash power with buyers of hash power. Hash power is a computational resource that describes the power that your computer or hardware uses to run and solve different cryptocurrency Proof-of-Work hashing algorithms. NiceHash service is unique in that it only connects different end-users and is not offering any cloud mining options – meaning NiceHash does not own or rent out any mining equipment. It gives you the mining software►►►https://www.nicehash.com/
If you want to mine with your pc or laptop download the software below after login en download be sure to switch Windows realtime protection off ►►https://github.com/nicehash/NiceHashMiner/releases/tag/3.0.6.5

On a old laptop it look like this yep its mining peanuts and 50% is for the juice and you can let it run in the background and surf the www. But i do not recommend to use a laptop because you can not replace parts as they burn up so it depends on the design of the laptop.

While running NiceHash Miner (or any other official open-source miner), your PC hardware (CPU or/and GPU) is solving different mathematical equations and sending the results to NiceHash. These results are then used to create new cryptocurrencies (such as Ethereum, Zcash, or Monero), or for allowing transactions between them. For each such result, you get paid in Bitcoin (BTC).►►►https://www.nicehash.com/support/mining-help/nicehash-miner/what-is-nicehash-miner On this site GPU and CPU hash rates info ►►► https://www.hashrates.com/