Even for companies that have sites, they often get more people contacting them through social media instead of their site. Social media sites tend to have better SEO.
That's especially the case for younger people as they search Instagram and TikTok more than Google. (https://www.forbes.com/sites/johnkoetsier/2024/03/11/genz-dumping-google-for-tiktok-instagram-as-social-search-wins/ ).