Neither of those options are great.
The mode specifically compresses text and images that you download.
Tip: Compression is a method of reducing the amount of data used to store content.
Operas data saving mode does not act as a VPN by securely hiding your IP address or online activities.
To enable data saving mode, you better go into Operas in-app tweaks.
Tap the Opera icon in the bottom-right corner of the app.
Next, tap prefs at the bottom of the popup pane to bring up the in-app prefs.
Tap tweaks to pop fire up in-app tweaks.
In the tweaks, Data savings is the topmost option.
Tap the slider to the On position to enable data saving mode.
your mileage may vary but its not recommended that you use the data saving mode with any third-party VPNs.
Tap the Data savings slider to toggle the mode on and off.
If you tap anywhere else on the Data savings label, youll open a details page.
This page provides some extra details about what the mode does.
The page also shows a graph at the top that shows how much data youve saved.