By default, your visitors can click on ingredients and it will take them to an archive page that lists all recipes using that ingredient. This can be quite useful but sometimes you want them to be sent to a specific website, perhaps to a shop where they can buy that ingredient (hello, affiliate marketers!).
Here you can customise the behaviour of the ingredient links. The options should explain for themselves.
Actual custom links can be added on the ingredient page by editing the existing ingredients or creating new ones. We could, for example add a link to the ingredient “bacon”:
If we did that, that link will appear in every recipe that uses bacon, so you only have to do this once!