Which marketing tools should marketers be using?

There are so many tools available to marketers, aimed at helping manage content, analytics, budgets, CRM and more. I'm working through the MartechMap to get myself up to speed.
Marketing Tools

I’ve been really looking forward to starting my deep-dive into the marketing tools that are available to us marketers. What do they offer and which ones should we be using?

I’ll be using the Martech Map as a starting point, drawing also on the latest infographic from the Product Marketing Alliance and others. Stay tuned as I work through the list!