Depends on your level and job. Honestly I’m still going to say LinkedIn in most cases, if only because Its the professional social network. Companies can look you up, so you need a good profile to attract those recruiters that pay to find people. It’s a sick game, but at least now there are AI profile services that can help you get ahead.

Indeed is cheap and used by cheap recruiters to get the most applicants directed to some other job board that costs them near nothing to aggregate resumes. You can’t even be sure you’re using the company job site to apply in some cases. At least with LinkedIn you can do the searching for the real job post.