While doing some analysis on a client website traffic in order to form a baseline for an online marketing campaing I started reviewing some of the sources of information on digital marketing I rely on. Over the years I've subscribed to many newsletters and followed many experts on Twitter and other platforms. In recent years I've trimmed things down and have settled on a few sources. I like newsletters because it allows me to passively receive daily, weekly or monthly summaries of content that I can ignore, or quickly scan, or click through and read a full article or blog post. Twitter is too scattered to absorb passively. Instead I have to actively segment sources in to lists. Or do searches. It takes more work to glean what's important to me.
Here's a list of my favorite newsletters. Even if you don't do the marketing for your own site, you might want to subscribe to one or more of these sources so you get an idea of what the buzz is about, learn the lingo and learn about how to talk to a marketer you might be working with.