Daedalus is a wallet, developed by IOHK which will allow you to store Ada.
Daedalus is a Hierarchical Deterministic (HD) wallet, allowing you to create an infinite set of keys from a single seed (We call the seed the 12-word Deadalus wallet recovery phrase).
Whenever you want to move your wallet, you will only need to enter your12-word Deadalus wallet recovery phrase and the HD algorithm will find all your Ada. This means you will never have to worry about managing lots of 12-word Deadalus wallet recovery phrases or files for keys.
More information can be found at: https://www.cardano.org/en/the-daedalus-wallet/