Facebook marketing: how do strangers know your business uses facebook?

[Jake]

To clarify, a business Facebook page is free, but their separate paid ads cost, similar to Google ads.

A search within Facebook might find matching content on your page.

There's an option to log in to Facebook under your company page name, any comments you post on others pages, groups etc. will be the company name NicksNacks, if someone clicks they are sent to the company page rather than your personal page.

Getting like votes for your page and followers can boost it's visibility in search results, etc. some companies use paid advertising to promote a sweepstake which requires them to follow your page before they can enter. Facebook ads are a bit cheaper when they direct people to a Facebook page rather than off site, contest ads tend to get a high click rate which makes the clicks cheaper, perhaps a nickel each instead of the 50 cents a click you might first pay.