Some statistics from Hubspot’s 2020 marketing report.
Facebook: As of Q1 2020, there are 2.6 billion monthly active Facebook users. (Statista, 2020)
LinkedIn: LinkedIn is the second-most popular social media platform used by B2B marketers, ranking only behind Facebook. (Statista, 2019)
Instagram: Instagram is the social channel with the second-highest ROI among marketers. (HubSpot, 2020)
Twitter: The largest U.S. Twitter audience by age group, as of September 2018, is tied between 25-34 and 55-64 year-olds. (Statista, 2019)
Pinterest: During a survey, 25% of responding social media marketers at B2B companies stated they used Pinterest to market their businesses. (Statista, 2019)
Actively using social media helps you build relationships with your readers. So, instead of viewing it primarily as a way to pitch your book, think of it as a way to connect with people. Answer questions, inform your audience with relevant content, engage authentically. You will even start building connections with influencers who may even become your promoters.
Take the time to develop your brand so all your social media platforms have a consistent look and feel. Start with just one platform and focus on developing a strategy for that platform where you not only build a following, you really connect and engage with your followers.