; (iii) in the case of a request made by, or on behalf of, a candidate, the name of the candidate, the authorized committee of the candidate, and the treasurer of such committee; and (iv) in the case of any request not described in clause (iii), the name of the person purchasing the advertisement, the name, address, and phone number of a contact person for such person, and a list of the chief executive officers or members of the executive committee or of the board of directors of such person. (3) Online platform For purposes of this subsection, the term online platform means any public-facing website, web application, or digital application (including a social network, ad network, or search engine) which— (A) sells qualified political advertisements; and (B) has 50,000,000 or more unique monthly United States visitors or users for a majority of months during the preceding 12 months. (4) Qualified political advertisement (A) In general For purposes of this subsection, the term qualified political advertisement means any advertisement (including search engine marketing, display advertisements, video advertisements, native advertisements, and sponsorships) that— (i) is made by or on behalf of a candidate; or (ii) communicates a message relating to any political matter of national importance, including— (I) a candidate; (II) any election to Federal office