Meaning of the word "tried and true" in English

What does "tried and true" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

tried and true

US /ˈtraɪd ənd truː/
UK /ˈtraɪd ənd truː/

Idiom

proven to be effective or reliable

Example:
This is a tried and true method for baking perfect cookies.
His advice is always tried and true.