Group ID Extractor V3 help you get list of group ids  where people shared post to.

this method  it's most less effort  way to find group for marketing purpose 

if you doing adsbreak  or fb watch  you can earn alot of money by sharing your post in to a groups

DOWLOAD 

​MEGA​

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You can export list id  to text file

or copy list of ids as text 

you can add multiple post links (1 link per 1 line)

by getting valid post link. you can right click under date of post then  select Copy link address

this also work as well