Most people treat professional networks as an online resume they update when they need something. Used that way, the return is minimal. Used as a research and contact tool, it becomes the fastest route into companies that would otherwise never see your application.
Fix the parts recruiters actually search
Recruiters find candidates through keyword search, and the fields they search are weighted. Your headline, current job title and skills carry more weight than the body of your profile. If your headline is just your job title, you are missing free space.
Write a headline that states what you do in the language your target employers use. Add the skills that appear repeatedly in postings you want. Fill the location field accurately, because location filters are applied early and aggressively.
Write the summary for a skim reader
Almost nobody reads a long summary. The first two lines are visible before the reader clicks to expand, and most never expand. Put the most important thing in those two lines: what you do, for whom, and one piece of evidence.
Below that, keep it short and concrete. A summary that reads like a personal statement will be skipped. One that reads like a clear description of capability will be read.
Use it to find people, not just jobs
The job listings are the least differentiated part of the platform. The genuinely useful function is that you can identify who works at a company, what their role is, and how you might be connected to them.
When you find a role worth applying for, search the company for people in the team you would join, and for anyone you have a shared background with. A message to one of them, sent alongside your application, does more than the application alone.
Write outreach that gets answered
Cold messages work when they are short, specific and ask for something small. A request for a thirty-minute call from a stranger usually fails. A single specific question usually succeeds.
Mention how you found them, why you are asking them in particular, and what you want to know. Three or four sentences is the right length. Do not attach your resume to a first message.
Be visible without being loud
You do not need to post regularly to benefit. Commenting thoughtfully on posts from people in your field is lower effort and puts your name in front of the right audience. Recruiters and hiring managers do look at who engages with their content.
If you do post, write about the work rather than about job hunting. Demonstrating expertise attracts opportunities. Announcing that you are looking mainly attracts other people who are looking.
Turn on the right signals carefully
The setting that tells recruiters you are open to work does generate inbound interest. If you are currently employed, use the version that is restricted to recruiters rather than the public banner, and understand that it is not a guarantee of privacy.
Keep it current between searches
The profiles that attract opportunities are the ones maintained when nothing is urgent. Updating everything in a single afternoon after being laid off is both obvious and stressful. Ten minutes every few months keeps it ready and makes the eventual search considerably shorter.