In order to share your referral code, head to your profile and select "Refer your friends = £3."
The orange code you will see at the bottom of that page is your own unique referral code! You can either give it directly to your friends; or click on the pink button "Refer your friends" to choose how you would prefer to share your referral code: by text, email, WhatsApp, Messenger, Instagram, ... take your pick ;)
Please note your friend can only enter your referral code if he/she registers on the app (and not on the Shopmium website). And your friend cannot register with the same bank account or PayPal account as you.
You will get your referral credits once your friend's first cashback request has been accepted. Thanks for spreading the word!