The study aimed to identify the most important dimensions and motives for Saudi university students’ exposure to and follow-up of influencer advertisements on social media, and to reveal the dimensions of credibility of these influencers among their followers and the extent of the respondents’ awareness of the compatibility and compatibility between the influencer’s personality and the personality of the brand for which he is advertising And an attempt to determine the nature of the relationship between the dimensions of this exposure and the levels of purchasing response among the respondents.), and this was done by conducting a survey study on a sample of young people (males and females) from King Saud University students in Riyadh, Kingdom of Saudi Arabia One of the most important results reached by the study is that the vast majority of the study sample respondents are exposed to social media in a high intensity, as they use it constantly (83.6%), and a large percentage use these media daily (69%), and they also prefer holidays to be exposed to social media, which are Fridays (24.4%), then Thursday (23.5%), and Saturday (19.4%)...