It’s hard to say what click through rate, conversion rate and view-through conversion rate will be for your site if you’ve never ran display before.
A lot also depends on how you have the tagging set up on your site. If you’re only serving ads to shopping cart abandoners, chances are your conversion rate will be higher since those people have already shown they are very interested in buying, on the other hand your view-through attribution should be lower since it’s likely that people who have added items to their cart were planning on buying anyway, regardless of seeing any display ads. That view-through attribution % is a pretty subjective metric unless you’ve got some kind of test and control methodology to really measure incrementality.
Another thing to consider is the creative you are using in the display ads themselves – if it’s heavy in promotion, like “get 25% off,” expect higher click through and conversion rates.
Download Online Display Remarketing Planner (.xlsx)