Token​ ​​airdrops​​ ​seem​ ​to​ ​be​ ​a​ ​thing​ ​in​ ​crypto​ ​PR​ ​right​ ​now.​ ​An​ ​airdrop​ ​is​ ​basically​ ​when​ ​a​ ​blockchain project ​decides​ ​to​ ​distribute​ ​free​ ​tokens,​ ​or​ ​coins,​ ​to​ ​the​ ​community. This​ ​happens​ ​after​ the project has completed its ​ICO​ ​​and​ ​the​ ​token​ ​has​ ​become​ ​tradeable​ ​on​ ​the​ ​open​ ​market. In​ ​most​ ​cases,​ ​to​ ​be​ ​a​ ​recipient​ ​of​ ​an​ ​airdrop​ ​the​ ​only​ ​requirement​ ​is​ ​that​ ​you​ ​have​ ​some​ coins from the relevant blockchain stored​ ​in​ ​your​ ​wallet — ie, if the company doing the airdrop is based on Ethereum, you need to have some ETH; if it’s based on Bitcoin or Ripple, you need to own some BTC or XRP.​ ​You​ ​need​ ​to​ ​be​ ​keeping​ ​your​ ​coins​ ​somewhere​ ​that​ ​has​ ​you​ ​in​ ​control​ ​of​ ​your​ ​own private​ ​keys,​ ​i.e.​ ​not​ ​on​ ​an​ ​exchange​ ​(where you really shouldn’t be storing your coins anyway, unless​ ​you’re​ ​using​ ​them ​for​ ​trading).