Usefulnes = makes a significant material impact on your life. The entertainment value does not count.
X, instagram, TikTok, Reddit have very little practical application you cannot find anywhere else. But I would rank them in this order from worst to most useful:
Reddit
Tiktok
X
Instagram
Mostly only for the fact you could use them to boost your small business
4. Facebook
I hate Facebook but marketplace can be useful. Only reason I haven’t deleted my account
3. YouTube
Probably has a video for the thing you are trying to do.
2. Dating Apps
Around 50% of Americans who entered a relationship met their significant other online in 2024
1. LinkedIn.
Can get you a job. That’s thousands of dollars worth of useful
There you go.
The rest is only entertainment value.