This link I found really helpful in my experience with submitting manuscripts for short stories and potential books to Literary Agents and publishing companies alike.
The author platform has nothing to do with social media outlets, such as BookLikes; but more of how often and who publishes your previous work.
Check out the link from Jane Friedman, a woman who has 20+ years experience in the publishing world.
Jane Friedman has 20 years of experience in the publishing industry, with expertise in digital media strategy for authors and publishers. From 2001–2010 she worked at Writer's Digest, where she ultimately became publisher; more recently, she was an editor at the Virginia Quarterly Review
, where she led digital strategy. Jane currently teaches writing and publishing at the University of Virginia and is a columnist for Publishers Weekly
. The Great Courses just released her 24-lecture series, How to Publish Your Book
. She also has a book forthcoming from the University of Chicago Press, The Business of Being a Writer
(2017). Jane speaks regularly at conferences and industry events such as BookExpo America, Digital Book World, and the AWP Conference, and has served on panels with the National Endowment for the Arts and the Creative Work Fund. Find out more.