Ключевые слова: advertisement, alert, app, background, banner, black, bubble, button, chat, closed envelope, connection, contact, correspondence, customer, email, gesture, hand holding phone, icon, inbox, incoming, influencer, information, input, isolated, letter, mail, mailbox, marketing, message, mobile device, network, newsletter, notification, online, online payment, post, read, receive, reminder, screen, send, service, sign, smart phone, sms, social media, symbol, technology, transaction,