A link to your portfolio including % breakdown.
Somewhat similar to the private mode suggested except it’s sharing the portfolio with anyone rather than just showing it on your phone.
Initially just a list with %s would be ok although eventually it’d be better if freetrade scraped some fund/share data from elsewhere and let people drill into individual holdings, performance etc
Some URL like freetrade.io/portfolio/UXJENDKLF for the inevitable questions from people you refer of “what do you invest in?”
Or you could add an option of “show portfolio publicly” and then you’d have a constant URL like freetrade.io/username/portfolio rather than a static list that might be out of date like with the UXJEND link