Most ISPs assign a dynamic IP address to the router, which can change at any time. In this case, you might need the DDNS feature on the router to allow you and your friends to access your router and local servers (FTP, HTTP, etc.) from outside your home network. Once you have DDNS settings configured on your TP-Link router, you do not need to check and remember the dynamic IP address every time it changes. This video shows how to set up and configure DDNS or Dynamic DNS in a TP-Link Router.
No-IP is one of the DDNS service providers on TP-Link wireless routers which you can use for free.
https://www.noip.com
Watch video How to Setup DDNS (Dynamic DNS) on TP-Link Router online, duration hours minute second in high quality that is uploaded to the channel Techy Druid 20 April 2023. Share the link to the video on social media so that your subscribers and friends will also watch this video. This video clip has been viewed 69,535 times and liked it 381 visitors.