Teen kids on Facebook know this trick already. If you want your friends to notice a picture you posted, just tag a truck load of them even if they don’t appear in the picture.
If you are posting a picture with other brands, pages or interests appearing in it, just go ahead and tag.
For example, the
picture below on Overdrive Magazine’s Page has a Renault Twizy in it with Ibiza in the background. That’s at least three pages that can be tagged. What it does is, it gets the other Page owners to notice what you posted and they may share your content if they find it interesting, thereby getting your content to go viral and add more fans to the page.
The trick is to not overdo it though. Else, it would become annoying for Page Owners.