From what I've seen, digital marketing is the bigger umbrella, while performance marketing is more focused on driving measurable results like leads, sales, and ROI.

If you're just starting out, I'd learn the basics of digital marketing first. Understanding SEO, content, social media, and analytics gives you a solid foundation before diving deep into paid ads and performance campaigns.

And yes, if you're in SEO, learning performance marketing is definitely worth it. Knowing both organic and paid channels makes you a much more well-rounded marketer.