Since 2016, Twitter has offered advertisers the ability to see which emojis users are sending in the app. That data turns out to be a gold mine for advertisers, which look at your emojis to determine your emotional state, then deliver highly targeted ads depending on your current mood.... Twitter noted that advertisers can use the emoji data to show users ads based on their mood, 'target people who tweet food emojis' and 'reach people on their passions.' 'If someone puts a thumbs up or a smiley face, show them this ad,' Aaron Goldman, chief marketing officer at 4C Insights,...