Google Custom SERP Bottom Indicator

When possible, Google customizes SERPs based on geo, a user's previous query and perhaps even other factors. When signed into their Google Account, users may see "even more relevant, useful results" based on their web history. Google's indicates when customized SERPs are being displayed. This indication is often located on the top right hand side of the page but, it can appear centered at the bottom of the page below results.