Google is adding 3 more categories to filter your AdSense ads, that totals to 8 categories. To get started with category filtering, sign into AdSense and visit Ad Review Center under AdSense Setup tab. You can choose from listed categories, which include religion, politics, and dating, and your selections’ll be applied to ads in English no matter how they're targeted. “Please keep in mind that filtering ad categories may affect your AdSense revenue -- we recommend first reviewing percentages displayed in your account to understand amount of revenue you may be blocking,” AdSense blog.