Blockchain Wallet is a cryptocurrency wallet. Like all other cryptocurrency wallets it's main function is to safekeep cryptocurrencies
Like it's name, blockchain wallet is based on the blockchain network which was founded by Peter Smith and Nicolas Cary.
One main feature of the blockchain wallet is it's highly intense security. Which has been it's most important feature over time.
There's an exchange section on the wallet that allows the buying and selling of digital currencies. This allows users to make transactions on their wallets without the need to visit cryptocurrency exchanges.
Blockchain wallet supports more than 18 languages, thus making it usable in lot of countries around the world.
Though there are complaints about the tediousness of its verification process, I will say that it is expected because the security of the wallet is intensely high and the tediousness of the verification process is a proof of this important feature.