What are the mistakes most of the marketers or advertisers doing while running Programmatic Advertising?

Marketers or advertisers make inevitable mistakes that affect ROI. Some of the common mistakes are:

Lack of market research: Advertisers should research the targeted market and how their competitors are performing, including the scope of the product or service. Else, there will be massive media spend made without any returns.

Goal: The goal of marketing needs to be defined by analyzing the scope of the targeted market.

Message: If the message in an ad is just a gimmick, and the site doesn’t have the message or any offer, then the user won’t come back to the site as the trust factor affects the user.