Most important thing about they way to use your business page on FB so far as I’m concerned is don’t ever swap likes, join in like ladders etc - there is absolutely no point! Yes, you may have a high number of ‘likes’, but what’s the good of having a big number of page likes if people don’t actually want to see your stuff in their newsfeed because they only ‘liked’ your page so that you’d ‘like’ theirs in return? If they’re not interested they won’t interact, and some will even switch off notifications from your page.
Aim for a target audience of people who will be genuinely interested in what you do - they are the ones who will like your posts, comment on them and share them. They are the people who will be your actual paying customers.
Don’t fill your page with only adverts for what you are selling - interact with your followers, ask them questions, get them to give input into your ideas etc.
I’m on about 1300 likes - the majority are genuine likes (I know a few people find my page, like it, and ask for a like in return - sorry, I don’t do that!) - my posts can reach 200 - 800 people depending on time of day and what I’m posting, which I’m pleased with. I could reach more if I paid for promotion, and I’ve done that a couple of times and reached about 2,000 people, and it did bring some new page likes and sales, but I’m so busy with commissions at the moment (yay!) that I’m not paying for any of that kind of promotion for a while