For the suppliers Amazon and Carl Roth, you can directly enter the ASIN or order number in the respective fields.
To do this, go to Material -> Edit Material. Once an ASIN or order number is entered, a reorder button will appear.

ASIN: You can find the Amazon Standard Identification Number on the Amazon product page under Product Details.
Carl Roth Order Number: You can find the Carl Roth order number under the Order Form tab.

Alternatively, for other suppliers, a configured master data field can be used where you can enter the link to the product on the supplier’s website.

This creates a clickable link in the material detail view.