You can safely ignore pre-authorizations from Shoppable as they are eventually all removed, usually immediately after checkout.
When you submit an order during checkout, Shoppable first issues a pre-authorization check with your credit card. This will include an additional 20% to account for sales tax and any small price changes that might occur once the actual order is placed with the retailers selected in your cart.
The pre-authorization is immediately followed by a cancelation of the pre-authorization as this will confirm and validate fraud prevention and that sufficient funds are available with your payment method. This will allow your selected retailers to charge your credit card and complete your order.
You can safely ignore pre-authorizations from Shoppable that might momentarily show up in your bank account as pending because they are always removed leaving only your charges from the retailers included in your cart for your purchases. You will also receive confirmation emails from these retailers confirming your purchases.
For Target orders only you will see a Shoppable pending charge that includes a 20% variable cost which will be processed for the final amount once the retailer confirms the order and items availability.