With further links you can add up to three further links (e.g. to manufacturer or information pages) in the description tab of a product. You maintain these via custom fields in the corresponding product.
Go to the "Product pages" tab
Expand the "Tab "Description"" block
Scroll to the section "Further product links"
Enable the configuration "Show further links"
Optional: Use "Open links in a new tab" to define whether the links open in a new tab
Save your changes after editing
Switch via the main navigation to the "Product managment" ("Catalogues" => "Products")
Choose the product you want to edit
Switch to the tab "Specifications"
Scroll to the section "Custom fields"
Enter the desired URL in the custom field "→ Further link 1-3"
Enter the desired link text in the custom field "Further link 1-3 – Title"
Save your changes
Edit the headline with the following snippet:
twt.detail.furtherLinks.title
Tab "Product pages" => Block "Tab "Description"" => Section "Further product links" => Show further links
Tab "Product pages" => Block "Tab "Description"" => Section "Further product links" => Open links in a new tab
twt.detail.furtherLinks.title
%product% is replaced by the product name.
twt.detail.furtherLinks.fallback
Note: The further links are displayed in the "Description" tab if the "Show further links" configuration is enabled and at least one link has been added via a custom field (Link 1–3).

Note: For information on how to edit snippets, see the following instructions:
Tip: If a change does not affect the storefront, just clear the Shopware cache: