You can send message to members of group. You can select groups on facebook and find members of group to send message.
FPlus help you send message to page you want. You can find page by keyword and enter contents of message.
FPlus help you send message friend. You can use mutiple account to send message by send message friend token.
FPlus help you send message on facebook with mutilple account. You can add contents of message and send to list UID.
FPlus help you send mutil message: send message for page, for UID friend of 1 UID, UID comment post, comment page.
You can send message by page for UID comment on page or comment on post.
FPlus help you send message for the liker post of you.