BitPay is a payment service that allows merchants to accept payments in Bitcoin and other cryptocurrencies, acting as an intermediary between buyer and seller.

BitStamp is one of the oldest and largest cryptocurrency exchanges, known for high trading volumes and its work with fiat currencies. The platform focuses on reliability and regulatory compliance.

A cryptocurrency exchange is an online platform where users buy, sell and exchange digital assets at market prices. It brings buyers and sellers together and handles the settlement of trades.

An exchange order is an instruction to the exchange to buy or sell an asset. It can be executed instantly at the current price or wait until the desired level is reached. It is the basic tool of any trading.

Blockchain is a distributed database in the form of a chain of linked blocks. Its records are protected by cryptography and stored on many computers, which makes the data practically immutable.