Sportingbet is a British online gambling operator, owned by Entain plc. The company was listed on the London Stock Exchange and was a constituent of the FTSE SmallCap Index prior to its acquisition by GVC holdings.
In sports betting, the term "1" typically refers to a betting odds format known as "Home Win" or "Team 1 to Win." It means that you are placing a bet on the outcome where the home team wins the event or match.