first of all you need to set up all the important things necessary in your page . then post some good contents to your page so that the people who are going to visit your page wont leave the page due to bad or no contents.
now upload a good profile picture that everybody will like.
look for the most famous and functional facebook groups that are similar to yours page purpose
now share your page profile picture link to the group,
from there people when people find your profile picture intersting they will click on the like button above the picture. and you can change your page profile picture regularly to more interesting pictures and keep sharing.
but take note , and make sure not to violate the group rules and regulations with the type of pictures you are going to sharing.
always share profile pictures that won’t violate the rules of the group
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