Online banner advertising and outdoor display advertising (billboards on the side of highways, for example) both use images to try to increase sales....

Online banner advertising and outdoor display advertising (billboards on the side of highways, for example) both use images to try to increase sales. In planning, both need to consider placement so as to be seen by their most likely audience. What are the key differences?

Please explain why intrusive ads may be a good choice for an advertiser? Discuss a situation where a user may see an intrusive ad and have a bad experience with it? Do you think that could change a user's opinion of that brand? If so, how?