Which type of source should Dallas avoid including in her report on the impact of social media on marketing?

In the context of Dallas's report on the impact of social media on marketing, it is crucial to use sources that provide credible, reliable, and well-researched information. A blog post by a popular Instagrammer, while potentially engaging and trendy, often lacks the rigorous peer review and scholarly standards that are characteristic of more formal publications. Such blog posts may contain personal opinions, anecdotal evidence, or marketing hype rather than data-driven insights.

In contrast, academic journal articles, marketing research reports, and books on social media marketing strategies typically undergo a comprehensive review process and are based on systematic research, making them far more credible sources for analysis. These types of sources provide comprehensive analyses and data that can substantiate claims about the impact of social media, grounding Dallas's report in well-founded evidence. Thus, avoiding the blog post is a sound decision to maintain the academic integrity and factual accuracy of her work.