Thanks for posting about this here in the Community!
You can have different settings for listening online (Streaming quality). You can find more info about the different options in this support site article.
Keep in mind that the higher the stream quality, the more data will be used.
You can reduce your data usage by toggling on Data Saver from the app's settings on your mobile device. To find out how you can do this, along with other tips, we'd recommend taking a look at this support site article.
Hope this helps clarify things! If you have any questions, don't hesitate to give us a shout.
Have a lovely day :)
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