Advice Wanted: Refreshing My SEO Know-How!

Hi guys,

It's been approximately three years since I worked for an SEO agency. During that time, my responsibilities included conducting full audits, performing site technical and on-page optimization, managing client onboarding, conducting keyword research, creating keyword maps, developing content plans, and more.

Now, I'd like to ask you:

What are other skills/knowledge you would recommend to master?

I don't see offpage seo, dealing with backlinks, guest post outreach etc.

You are missing big one: BACKLINKS.
Focus on High Quality Backlink

I work on off page as well, sometimes with developers.
Outreach and order backlinks, too.

What else?