The first part of your phrase is great: "This page is an affiliate marketer...", but the second part is a little unclear. Also, because you used a period after Amazon instead of a comma, you created an incomplete sentence with the phrase "products like books, bags, electronics/computers, etc."
I would rephrase it as follows:
"This page is an affiliate marketer that mostly promotes Amazon products (e.g., books, bags, electronics/computers, etc.)."