YouTube and Facebook are the most widely used social media platforms in the United States. Half of U.S. adults say they use Instagram, and smaller shares use sites or apps such as TikTok, Reddit, Snapchat and X (formerly Twitter). Who refers to someone performing the action of a verb (e.g. They are the ones who sent me the gift ), and whom refers to someone receiving the action of a verb ( I'd like to thank the gift-givers, whom I've known for years ). In grammar terms, that makes who a subject, and whom an object. Whether to use who or whom confounds a lot of people. The basic rule is easy enough, but even the most seasoned editors and writers can stumble. Yes, who uses it? is what we say when asking a question, whether or not we expect the answer to be in the plural. The search showing who use it probably reflects a reference to a plural subject, and not a question. The following is a mini-tutorial on the uses of who, whom, and whose. If you already know how to use these words, you can skip the explanation and go directly to the exercises. Learn who’s on Reddit, how they use the platform, and how your brand can create a presence there — in an authentic, community-focused way. Learn how to identify the difference between who and whom, as well as whose and who’s, in sentences. What is the Difference Between Who and Whom? How do you use who and whom in a sentence?. Who is a relative pronoun that refers to people. It functions as the subject of a verb in a relative clause. This means that “who” performs the action described by the verb in the clause. “Who” is used when the person being referred to is the one doing something. We use whom to refer to people in formal styles or in writing, when the person is the object of the verb. We don’t use it very often and we use it more commonly in writing than in speaking. To understand who uses social media and how often they do so, we examined the personality traits that predict frequency of using a set of 10 different types of social media (e.g., social networks, blogs, virtual worlds).