Yoast Seo Edited snippet and Seo Title isn’t showing on google

Heres an image of how I have edited my snippet and Seo Title (Theres no option to share an image), but trust me, I changed the title from “Rate Your Music” to “Canadian Singer and Songwirter” and saved it. But on google it shows “Rate your Music”. Whats the solution to this?
google url: https://www.google.com/search?client=firefox-b-d&ei=OUpvXajgB8nivgSYpanYDg&q=paperinmusic.com+shawn+mendes&oq=paperinmusic.com+shawn+mendes&gs_l=psy-ab.3..35i39.2044.3190..3785…0.0..0.384.840.0j3j0j1……0….1..gws-wiz.k6HN9FilIT0&ved=0ahUKEwjo4LiytrbkAhVJsY8KHZhSCusQ4dUDCAs&uact=5

The page I need help with: [log in to see the link]