Quoting from the article itself by SimplyMeasured.com to give you an intro to the ebook:
“Hashtags have become nearly ubiquitous in online communication. Once only a Twitter phenomenon, users have now adopted hashtags across many
social media channels to categorize and organize posts by topic and track discussions. For brands, they are a way to build awareness around products
In this guide, we’ll discuss hashtags – what they are, why your brand needs them, and how to measure their impact on your marketing campaigns. We’ll also discuss strategies used by brands that have had success using hashtags.”
This is an ebook that I downloaded from Simply Measured and the PDF is available here.