What's the significance of iv's in Pokemon go?

I have a Dragonite that appraises to the top rank for iv’s with one perfect stat, and a Dragonair with two perfect stats. I’m curious if it’s worth it to get more candies to evolve the Dragonair, or of I should power up the Dragonite, which also has a good moveset. Any help would be appreciated!

Pleaselog inorregisterto add a comment.

So according to your comment the CP of your Pokemon is:-Dragonite: 900-Dragonair: 1,000And your dragonair has more perfect IV stats than your dragonite.Then this should be easy then. If your Dragonair has more CPandbetter IVs, then it beats Dragonite pretty easily. If you evolve Dragonair, it will still be powered up so you wouldn’t need to power-up your other Dragonite, so you will have both 2 perfect IVs and a high CP dragonite.

However, I suggest waiting because remember, you might find stronger Dragonite/Dragonair/Dratini while searching for Pokemon. Also, I notice Pokemon with higher CP gain more CP evolving, so I also suggest that you power up your Dragonair befrore evolving. If your still hesitant, then tell me the moveset of both of the Pokemon and which IVs are perfect.

Source: Experience

BTW I really hope you didn’t mix their CP by accident. Other than that, hope I helped! If not, I’m sorry.