According to what I have understand through several articles, Facebook Instant Personalization means that any application or third party you use through FB will be able to pull out your user information to give you a personalized experience on their app/site.
I don't really know, if this is actually good or evil like discussed by many people on the web? Some say that these new settings make it easier for apps or sites to determine what you probably like on their site. You'll be able to see what people in your friends circle like related to this certain app/site, and it also works the other way around. On the other hand there are also people that say Instant Personalization leaves the doors open to privilege abuse. People are able to see your related activities and information, weather you like it or not. You can find more insightful articles on this issue on the web.
If you feel uncomfortable about this whole situation and decide that you want to be more in charge of your private information, you can still opt out of this setting. Here are steps on how to disable Facebook Instant Personalization:
- Choose Privacy Settings from Account.
- Scroll down to the left bottom of page and edit your settings in Applications and Websites.
- Edit settings in Instant Personalization.
- Deselect Enable instant personalization on partner websites and confirm to save changes.