Navigate to the Shopify Admin Page -> Customize -> Theme Editor -> Theme Settings -> Product Page -> Custom Link on ATC Button
When this option is enabled, the ATC Button of the product you put a URL Link will redirect to that specific link
Other Useful Information:
Different Add To Cart Options - Change the General Add to Cart Button to different styles/ layout
Variant Swatch Style Options - Learn how to change the variants swatches to different styles.
TAGS: custom link, custom link on ATC button, custom link on atc button, amazon, amazon link, specific link, redirect, buy from amazon, buy from, buy, certain link, amazon.com, amazons