A google penalty for keyword stuffing in title tags?

We gathered many interesting pieces of advice from Google regarding the title of web pages. John Mueller mentioned that keyword stuffing in the titles was penalized. We also found that Google didn’t like when a word was repeated several times in a page title. 

How to create a good title:

• Don’t repeat a word several times
• Don’t put many words together like “basketball ball – 1960’s vintage ball – ballimax.com
• Beware of the site title that you add at the end of the title because Google reads it. things like “broker offers | cheap broker site”
• Google does not like generic words like “about us” or “contact” or “profile” or “terms” because they aren’t informative. They are too generic. You should replace those title with “About John Doe”, or “Contact John Doe” or “introducing John Doe” or “ACME inc. terms”.
• Avoid using titles like “Page category”,”page”,”untitled”,”unknown”
• Google reads site titles in your page titles be aware of it because it could be considered as a boilerplate text, keyword stuffing or repeated text.
• Be cautious about the site titles with a meaning for example: Dog rescue – July 2018 – dogrescue5393.com”

Examples:

Repeated words:

Plumbing Repair in Tampa, FL | Florida Plumbing Service & Repair

Plumbing and repair was repeated twice. Florida and FL means the same thing. A better approach would have been:

Plumbing Repair in Tampa, FL | Marcello Lopez LLC.

There is no repeated word and every single word is informative.

Keyword stuffing:

Imagine the following page title. Be cautious about the words in the site title.

John Doe Dating Coach | JohnDoeDatingcoach.com