What is the implication of including disguised advertisements in Main Content (MC)?

Including disguised advertisements in Main Content (MC) can lead to a low quality rating because it undermines the trust and transparency that users expect from web content. When advertisements are not clearly identified as such, users may feel misled or deceived, which negatively impacts their experience. Search engines and quality rating guidelines prioritize genuine and valuable content over content that is primarily driven by advertising. A low quality rating can result from content that fails to serve the user's needs satisfactorily, particularly if it appears to prioritize commercial interests over providing informative or engaging material. Hence, the presence of disguised advertisements compromises the integrity of the content and is viewed negatively in quality assessments.