How do I add recommendations such as this one for highlighter.com to my profile?

https://i.nostr.build/G8W2yGTsEoDeIJcr.jpg

#Amethyst #AskNostr nostr:nprofile1qqsyvrp9u6p0mfur9dfdru3d853tx9mdjuhkphxuxgfwmryja7zsvhqpzamhxue69uhhv6t5daezumn0wd68yvfwvdhk6tcpz9mhxue69uhkummnw3ezuamfdejj7qgwwaehxw309ahx7uewd3hkctcscpyug 

 Only on an app manager client: https://nostrapp.link/ 

 That mystery has been bugging me for a while, thank you sir!