Google to offer 'interest-based' ads

Google is offering 'interest based' ads to its massive users. Apart from its existing target-based advertising model (offering users targeted ads based on what they are searching for at a particular moment) this model will help user to view, delete or add interest categories associated with their browser through Google's new Ads Preferences Manager tool. For eg: if you cite 'Indian recipes' as among your main interests, you'll be able to view recipe-related ads even when you're on a website that's wholly unrelated to recipes. Better user experience?