The document provides 20 tips for online advertising including keeping the target customer in mind, ensuring ad accuracy, using negative keywords, keyword targeting, mobile-preferred ads, conversion tracking, campaign monitoring and tweaking, remarketing, including main keywords, clear calls-to-action, targeting new devices, using text messages for local ads, various ad formats like text, images, rich media and video, using creativity and impressive language to create curiosity, using high quality images and emotional appeal, communicative and thematically sound ads, ads that are interesting and credible, drawing attention of the target market, and using creative style, tone, words, format and color.