For sellers, you need to verify your phone number to make your products visible to others.
For buyers, you need to verify your phone number to process the orders.
This is to ensure that accounts are valid and belong to actual users. We want to create a safe and positive community here at Shopee.
To verify your phone number go to: Me tab > My Account > My Profile > Phone
Enter your password, add in your number & lastly verify it by entering the V-Code sent to your number