Again and again, I hear and notice people not taking advantage of promotions that are available to them and they are eligible to get it, but don’t take the action that is required in order to actually receive it.When shopping on a site. Familiarize yourself with all elements on the page, so that if there are promotions listed somewhere you know where to look for it. Mostly promotions would be prominent and visable so that the user should see it and get the price outright, but in lots of cases that I know and is well known, it will not be highlighted to the user, the reason is that once a seller lowers a price and it is visible other robotic systems will pick it up and mostly match the price if possible within thier margin, and in order to avoid that retailers may tend to have a better price but require an action either a promo code or to click something to reveal it, or click some button and not even reveal it till the cart.And these could sometimes be real savings. So again familiarize with all elements of a website page so that you are aware of the locations these may be posted. So that when you shop, you will know and assure that you are not missing out on any promotions .
Good luck.