In today's digital age, having a blog for your digital marketing strategy is more important than ever. A blog not only helps to drive traffic to your site but also allows you to establish authority and build trust with potential customers. It also gives you a platform to share valuable content and insights about your industry. Furthermore, it can significantly improve your SEO, making your business more discoverable online. So yes, to stay competitive in 2019, you definitely need a blog for your digital marketing efforts.