The group was first introduced in the reality survival program WIN: Who is Next as "Team B". After that, Team B went on to appear in the 2014 reality survival program Mix & Match, which determined the final seven-member lineup of iKon: B.I, Bobby, Jinhwan, Ju-ne, Yunhyeong, Donghyuk and Chanwoo.
The group released their debut studio album Welcome Back (2015), which debuted atop the South Korean Gaon Album Chart and produced the number-one singles "My Type", "Apology" and "Dumb & Dumber" and three top-ten singles: "Rhythm Ta", "Airplane" and "Anthem". The album was commercially a success, selling 260,000 copies in Asia, and the songs sold 4.8 million copies, which lead the group to win several best new artist awards on major Asia award shows, including Mnet Asian Music Awards, Japan Record Awards and QQ Music Awards.