This is a great question! Your credits page is really important. Firstly, and probably most importantly, it is the place where you can give credit for any photos, clipart or fonts you have used in your product.
The credits page is also a great place to list similar products your buyers might like. list and link to resources to generate more sales.
I also like to include social media follow buttons in my credit page to allow more ways for followers to connect with me.
How you lay out your credits page is up to you but here is one of mine to give you an idea.
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