In my opinion that's not good advice. Over the past 11 years this domain already built up some domain reputation and incoming links. Changing the domain for no good reason won't help with people understanding the use case of the site.
The domain doesn't really matter so much as you can see with "replit.com", "chatgpt.com" or "stripe.com" which don't explain anything either.
If you want to invest time I'd suggest:
- Clean up design (Remove multiple disclaimers, side bar etc.)
- Add h1/h2 that instantly explains what this is about
- Have a list of simple examples that can be executed, not just "select * from demo"
- If you want to increase traffic, take a look at "site:sqliteonline.com" on Google. There's currently only 14 pages indexed, so lots of low hanging fruits to optimize. Could also be extended by having pages dedicated to examples or a topic that people can land on if they search for things like "left join sqlite" etc.
- Change site title from "SQL Online AiDE - Next gen SQL Editor | SQL Compiler" to something explaining what this is about.