What is an important consideration for advertisers using smartphones in online advertising?

The focus on mobile compatibility in online advertising is crucial because a significant portion of digital content is accessed via smartphones. As more consumers use their mobile devices for browsing and shopping, advertisers must ensure that their ads are designed to perform well on these smaller screens. Mobile-compatible advertisements can adapt to different screen sizes, allowing for better visibility and user engagement. This adaptability can enhance the overall user experience, making it easier for consumers to interact with the ad, which ultimately increases the effectiveness of the advertising campaign. In contrast, advertisements that are only desktop compatible or static may not capture the attention of users accessing content through their smartphones, leading to missed opportunities for engagement and conversion.