The main purpose of this research is to compare influencers' and celebrities' posts exposing a brand name according to a few metrics which are ad type, number of likes, number of comments, post type, number of page views for videos, product/service category of exposing brands in posts and engagement rates. With this purpose, this paper examines influencer and celebrity endorsement on Instagram by a content analysis focusing on posts exposing a brand name. Results of the content analysis of 126

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... osts of six Turkish celebrities and six Turkish influencers revealed that the total number of posts shared by influencers are doubled the total number of posts shared by celebrities. On the other hand, the total number of posts with a brand exposed by celebrities is more than influencers'. In terms of product category, fashion/clothing/apparel products are shared mostly for both groups. Another important result of this study is about ad type used by celebrities and influencers in their posts. According to the results, the most used ad type by both celebrities and influencers is sharing the brand while using the product.