Add to cart (ATC)
E-commerce
The action of putting a product in an online shopping cart, and the button that does it. Add-to-cart rate measures how many visitors take that step.
A store has 20,000 sessions in a week, and 1,400 of them add something to the cart. Its add-to-cart rate is 7%. After making the button sticky on mobile, it rises to 8.2% the next week.
It's the clearest early signal of whether your product pages persuade, long before you see the final sales numbers.
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