A welcome offer is any promotion available only to a newly registered account. It usually triggers on the first deposit or the first settled bet.
Three formats dominate the Canadian market. A deposit match adds bonus funds as a share of the first deposit. Bonus bets hand over free stakes after a qualifying wager. First-bet insurance refunds a losing opening bet as bonus credit.
Ontario adds one quirk. AGCO rules bar operators from advertising bonuses in public media. Offers appear only on the operator's own site or to players who opted into marketing. That makes independent comparison more useful than in most markets.