What does 0* 1* 2* 3* 4* mean in Pokemon GO?

you can search pokemons by starts (appraisal) in pokemon go search pokemons box

Instead of clicking on appraise inside each pokemon screen you can search for them in the pokemons main screen search box and see all the pokemons with the same appraisal

the easiest why to search for full 3 star pokemon : (100 iv pokemon !)

4*

 more info:

4* – pokemon with 100 iv ! 3 full stars in appraisal ( 15 15 15 stats)

3* – pokemons with 82 iv to 98 iv, 3 stars pokemon but not full.

2* – pokemons with 66.7 iv to 80 iv. 2 stars pokemon.

1* – pokemon with 51 iv to 63.4 in, 1 star pokemon.

0* – pokemons below 50 iv, 0 stars pokemon.