What does it mean for Google to be more personalized with Google Accounts?

When you're signed in to Google Accounts, you'll now get more relevant, useful search results, recommendations and other personalized features. For example, if you use Google Bookmarks or Google Search History, you'll get more targeted web search results and recommendations for videos or gadgets. You can easily access these recommendations by adding the "Interesting Items" gadget directly to your personalized homepage.

Read more: Google Accounts