Use much better.

Do not use more better in standard English.

Why?

Because better is already the comparative form of good.

So the pattern is:

That means you do not need more before better.

If you want to strengthen it, use:

So:

✅ This version is much better.
❌ This version is more better.

✅ This solution is better than the first one.

Here, better already does the comparison by itself.

✅ This solution is much better than the first one.

Here, much intensifies better correctly.

❌ My English is more better now.
✅ My English is much better now.

This is the exact kind of error the title is warning about.

✅ Things are a lot better than they were last year.

You can intensify better, just not with more.

The most common mistake is treating better like a regular adjective that still needs more.

It doesn’t.

Better is already an irregular comparative, just like:

So saying more better is like saying:

It sounds wrong because the comparison has already been built into the word.

Another common mistake is thinking this is just casual slang. In some speech communities, people may say it informally or for emphasis, but in standard written and professional English, more better is treated as incorrect.

Use this rule:

If the word is already a comparative, do not add more.

So:

If you want to add emphasis, use:

A simple memory trick:

better already means “more good”
so more better is one comparison too many.