Apple iCloud Storage

I received this message the other day:

It was the first time I had reached 50% of my allotted storage space, so I was wondering what kinds of documents are stored in iCloud. Here's the answer from Apple Support:

• App data
• Apple Watch backups
• Call history
• Device settings
• HomeKit configuration
• Home screen and app organization
• iMessage, text (SMS), and MMS messages
• Photos and videos on your iPhone, iPad, and iPod touch
• Purchase history from Apple services, like your music, movies, TV shows, apps, and books
• Ringtones
• Visual Voicemail password (requires the SIM card that was in use during backup)

My guess is that photos and videos take up a majority of iCloud space for most users. Since I store my photos and videos in Google Photos (which provides unlimited storage space if you enable compression) and remove them from my phone, iCloud storage has never been a challenge for me.