Tumblr: what it is, how it can extend your reach and deepen customer trust, and how to establish an effective Tumblr strategy for your company. Tumblr can be a great way to jump into social media marketing. If you’re already neck deep, it’s a great way to reach an active new audience. The best part: you can feel your way around and measure results without allocating excessive time, money, and resources. Why Tumblr? Because it works.