> For the complete documentation index, see [llms.txt](https://dagora.gitbook.io/guides/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dagora.gitbook.io/guides/beginner/lessons/readme/pos-chains.md).

# PoS Chains

Proof of Stake (POS) uses randomly selected nodes to validate transactions. 

In order to do this, miners must put up a certain amount of money as a stake, which is used to determine how much power they have to verify transactions. The more money a miner puts up as a stake, the more likely they are to be chosen to validate a new block of transactions, and the more rewards they stand to earn.