To get the Instacart Credit Card sign-up bonus, new cardholders don't have to do anything except get approved for the card. The Instacart Credit Card bonus is $100 Instacart credit.
Keep in mind, however, that you will not be eligible for this introductory bonus if you currently have the Instacart Credit Card, regardless of whether you previously received the bonus. You also may not be eligible if you recently earned the bonus.
In addition to the sign-up bonus, the Instacart Credit Card offers 1 - 5% cash back on purchases. Its annual fee is $0, and you need good credit to get approved for the card.