Visual improvement tips
For best display, our site is improved for the most circumstances. In some cases, like physical issues, it may be advisable to use different screen settings. You don't need to do this each time (e.g. zooming in) - you can set this by default (for all websites). Some websites are not compatible for this, ours is.
Best practice is to adjust the font size. It's "better" than adjusting "zoom levels", because font size doesn't affect the website structure that much.
Here are some tips (per browser):

Go to Settings (type chrome://settings/appearance in the address bar) > Appearance > Font size. Adjust "Page zoom" in the same section.

Go to Settings (or Preferences) > Advanced > Check "Never use font sizes smaller than", then select a minimum size. Page zoom is found in Settings > Websites > Page zoom.

Open browser > tap the three-line menu (bottom right) > Settings > Webpage view and scrolling > Website text size (adjust the slider). Default zoom not possible in Samsung Internet. Alternative: Phone Settings > Display > Screen zoom. Text size also available in these Settings.

Settings > General > Language and Appearance > Fonts options. "Default zoom" available in the same section. For mobile, adjust font sizing under Settings > Accessibility.

Go to Settings and more (...) > Settings > Appearance > Select a new size under the "Fonts" section. For finer control, click Customize fonts, use sliders for precise font/minimum sizes. Under the "Zoom" section, set the "Page zoom".

Settings > Appearance > Font size, or select "Customize fonts" for specific font types. Zoom level available in the same section.
