I've only optimised the About Me section. I neither update my job level information nor upload my resume on my profile.
I take part in discussions related to my domain in the posts published by LinkedIn Top Voices/Influencers. Many TA folks follow these influencers to see who makes valid points and head hunt them for relevant roles later. It's also a good place for your profile to be visible before Co-founders since they're also reading through stuff here and there.
The idea is to make valid points which the community acknowledges. Your comment stays on top.