Answer: a web banner or banner ads
Explanation:
Web banners or banner ads are those advertisement that are placed by a server on the World Wide Web. Usually you will see them when you reading an article or searching for something on the web, there are always those pictures that keeps popping as ads because they are usually attached on the web pages that you use for your web searches.
Banners ads are placed as images with fewer words , the aim of these ads is to inform the web visitors about a brand they may not be aware of and this is useful because website is the most used platform. They grab the web user's attention in a way that it is likely that the person will click on them and to the their website. This increases the brand awareness.
Banners ads will grab your attention in a way that they may even let you be aware of special discounts you were not aware of.