- Avoid all types of ads above or within the product list
- Avoid text ads below the product list
- Avoid overlay dialogs on page load
- Avoid highly graphical ads in prime content locations on the homepage (especially when it comes to competitions and discounts)
Graphics that adopt the characteristics of the site (background, text colors, fonts, etc) and avoid visual boxing are less likely to be perceived as ads.
Adding ads in the sidebars is fine, as long as they’re not mixed with filters or sub-categories.