Shortened link
The link you followed has been shortened with is.gd. Shortened links can go anywhere on the Internet so you shouldn't continue if you got the link from a suspicious source e.g. junk email.
The full original link is shown below. Click the link if you'd like to proceed to the destination shown: -
https://www.sololearn.com/Certificate/1024-1184956/pdf/?lipi=urn%3Ali%3Apage%3Ad_flagship3_profile_view_base%3BVxIKhgd4QwSb0g3maTDjMw%3D%3D
Tip: some QR readers fail to read mixed case URLs properly. We recommend using the lower case option or a lower case custom URL with QR codes.