What is Bitcoin Wallet?

[eijikaido11]

A bitcoin wallet is a software program that stores the record (aka private key) of every bitcoin you own. Bitcoin wallets come in many different forms, and it's important to understand them -- and how to keep them safe -- before you even start buying bitcoins.
To understand bitcoin wallets, it is helpful to review some basic foundational information. Bitcoin addresses, which are strings of letters and numbers, contain both a private and public key.
A private key gives a user the means to spend bitcoin. A public key is more like a destination that lets a user to receive bitcoin.
Because a private key holds all information needed to access a bitcoin address, one can use it to derive the public key.