Ключевые слова: app, best, blackboard, blue, board, business, button, chalk, choice, class, comment, customer, design, element, excellent, experience, expression, favorite, feedback, feeling, five, form, good, internet, magnifier, mark, menu, page, plan, product, quality, rank, rate, rating, recommendation, review, satisfaction, satisfied, search, select, service, star, status, success, support, system, us, vote, web, white,