Keyword vs. Tag in Solutions

This newer answer seems to go against this:

And then there’s this:

We opened a ticket about if they are deprecating Keywords and Tags fields:

​Freshservice still uses keywords to search, and here's a detailed article on how the keyword search works on each module. 

https://support.freshservice.com/en/support/solutions/articles/231703-how-search-works-in-freshservice

Also, for solution articles along with the keywords we allow searching based on the title.  

Then I found this: https://support.freshservice.com/en/support/solutions/articles/50000005608-best-practices-to-create-solution-articles 

“The title should contain the primary keyword(s) that the article is about.”

“Avoid relying on tags and keywords”

Hello! I am looking to make it easy for our customers to search for support articles in our portal and would love clarification on the thread & responses above. 

• Are adding tags within our solution articles for internal purposes only?
• Is the key to searching for articles primarily in the title? 
• Do you have a definitive tagging best practice article to 1) help users search and 2) for our ticketing system to suggest articles within tickets? 

Thanks!