Triangle symbol on my Galaxy S9

[Android Central Question]

I have a triangle symbol next to my Wi-Fi symbol on my Galaxy S9. What is it and how do I get rid of it?

 

[martyn30162]

data saver is on go to settings and turn off

 

[ABOSWORTH007]

data saver is on go to settings and turn off

This is correct. My wife had this on her S8 yesterday and it took me a little while to figure out what the heck it was.