After the game concludes, the screen will display various statistics and your final rank. If you were playing in a group and managed to win 10 games (not necessarily in a row), a special screen will appear. In the center of the screen, there will be a picture of a character. It is recommended to feature the hero that the player played the most during those 10 wins, although the choice is ultimately up to the developers.
The character in the picture will congratulate the player on winning 10 games and announce that a special gift is waiting. The nature of this gift can be determined based on different options. It can either be decided through a group vote, where all members of the group get to participate in the decision-making process, or each player can individually choose their own gift.
The list of special gifts includes various options such as a 2x XP boost, a reduction in the number of votes required to level up endorsement, receiving 200 coins, obtaining 500 legacy coins, earning 10 OW league points, exchanging skins with a partner, increasing the number of players you can avoid in a game, or saving up for a special skin in the store. For instance, if there is a legendary skin available in the store and a player doesn’t have enough coins to purchase it, they could choose to save their rewards for the skin and unlock it after winning 50 more games.
You developers choose if this is going to be specific for groups or if solo players could also get that.