For a long time, the standard viewport meta tag went like this - <meta name="viewport" content="width=device-width, initial-scale=1"> However, since iOS Safari 9.0 was introduced in September last year, a new additional value is now needed for most responsive websites, making this the new standard meta tag - <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> Why