Earlier quoted context omitted.
Never apply through LinkedIn. It is so low-friction that the vast majority of applicants are nowhere near qualified, and hiring managers quickly learn to ignore anything that came in from LinkedIn.
OTOH, if you are job hunting, be sure to keep your LinkedIn profile up to date.
TL;DR don't bother with all that recruiter spam and general engagement tactics for yet another data hoarding, privacy violating "social network". If you are doing a good job and keep investing in yourself there will always be good jobs in this industry.
Build Trust and Carry On