Use the adjective bridal to talk about a wedding or a bride. A bridal bouquet is the arrangement of flowers the bride carries during a wedding ceremony.
Usually the word bridal describes anything having to do with a bride, like the bridal veil or the bridal party, or the bride's friends and family. Sometimes bridal refers to the newlywed couple, like the bridal suite they might stay in at a hotel on their honeymoon. Remember, bridal has nothing to do with horses — that's bridle, which sounds the same but means part of a harness.