A Facebook Cover Photo play a vital role to getting more Followers. it should be relevant to your business. you can use more cover photos using slide option, you can also upload a video as cover photo. the recommended cover photo size is 820 pixels wide by 312 pixels tall on computers and 640 pixels wide by 360 pixels tall on smartphones
You can get good cover photos from this link
Pexel | Facebook cover
2.Invite your friends to like your page
3. Join Related Group
Join all groups that relate t
o your business. Post your contents in all groups will help you to increase the followers.
4.Outside of Facebook
Share your page out of the Facebook, for example in Instagram, Linkedin, Twitter so on.. you can share link tin you website too.
and you can mention in your prints, printed advertisements will give yo more followers.
Always pin important post in your page. can pin a post like you vision mission of your page, the reason why you created the page, and how this page can help the people those who like the page.