der Surfer
surfer
A person who rides waves in the ocean on a surfboard (surfing) or glides across the water with a sail (windsurfing).
Die Surfer warteten am Strand auf die perfekte Welle.
The surfers waited on the beach for the perfect wave.

surfer
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surfer
A person who rides waves in the ocean on a surfboard (surfing) or glides across the water with a sail (windsurfing).
Die Surfer warteten am Strand auf die perfekte Welle.
The surfers waited on the beach for the perfect wave.

The word 'Surfer' (surfer) is derived from the verb 'surfen' (to surf). The ending '-er' denotes a person who performs the activity. This pattern is very common in German.
Ein Läufer ist jemand, der läuft; ein Surfer ist jemand, der surft.
A Läufer (runner) is someone who runs; a Surfer (surfer) is someone who surfs.
You can tell from the context whether a water surfer or an internet surfer is meant. Words like 'Welle' (wave), 'Meer' (sea), or 'Surfbrett' (surfboard) point to the athlete, while 'Internet', 'Netz' (web), or 'Webseite' (website) refer to the internet user.
Der Surfer wartete auf seinem Brett auf die nächste große Welle.
The surfer waited on his board for the next big wave.
In the context of water sports, 'Surfer' (surfer) is often combined with certain places and pieces of equipment. Typical phrases are 'Surfer am Strand' (surfer on the beach), 'Surfer auf der Welle' (surfer on the wave), or 'Surfer mit Surfbrett' (surfer with a surfboard).
An der Küste Portugals trifft man viele Surfer aus der ganzen Welt.
On the coast of Portugal, you meet many surfers from all over the world.
user
'der Nutzer' and 'der Surfer' can both refer to people who are online. But 'Nutzer' is more general and neutral: a person uses an app, a website, a device, or a service. On the internet, 'Surfer' especially means someone who goes from page to page and looks for information or simply browses the web. Learners may confuse the words because both occur in connection with the internet. For apps, accounts, services, or technical systems, 'Nutzer' is usually more precise. 'Surfer' fits better in casual talk about moving around on the internet.

Viele Surfer verlassen die Seite, wenn sie zu langsam lädt.
Many surfers leave the page if it loads too slowly.
Die App zeigt jedem Nutzer seine letzten Nachrichten an.
The app shows each user their most recent messages.