ABOUT FACEBOOK AUDIENCE INSIGHTS

[chicadona1]

Hello Everybody,

Is someone can show me how to use the category page and page like in FB audience insights ?Here is my issue
When I come to the section of pages like, I"m having 3 situations

1- I insert 1 page in the interests box, the audience size goes up from  2.5 M  to 40 M
2-I insert   another page, nothing happened
3-I insert a third one the audience size went down from 40 M to 900 K

I presume that the third page is the good one right ? So, if it is, may I just use that single page in my interest section and I don't need
to add another interest ?
Thank you for your kind response.