Bitcoin is a digital currency, so you need to have a piece of software to manage coins and facilitate transactions. The community of digital currency calls such programs "bitcoin-purses". There are many different wallets, each of which works in different ways and differs by its principles. It is important to choose the one that is right for you - https://newsystem.info/kak-vybrat-kriptovalyutnyj-koshelek-rukovodstvo.html