What do you freelance in? Copywriting? Web Dev? Graphic Design? Whatever the specialty is, you’re safe in the knowledge that there's countless verticals, sectors and industries that all need what you offer.
Yet try to be everything to everyone and you’re setting yourself up for a fall. Spreading yourself too thinly will result in failure.
Like the title says you've got to find your tribe, the people and businesses that will want your services. Its always advisable to niche down, concentrate on a small corner or industry and build your reputation out from there.
The target audiences you should be after congregate on locales all across the internet - from Facebook to Reddit to Slack to Discord to independent communities.
Its a veritable galaxy to get to know their needs, what they’re receptive to, what they discuss, what they have a gripe and most importantly how you can help them.