A 3:1 zoom ratio is very common in many scope models. It gives you 3 times more magnification at high power than at low power so you can dial your power down for close encounters or all of the way up for long-range shots.
Model #181307 - VX-Freedom 3-9x40 Riflescope with a Hunt-Plex Reticle, Capped Finger Click Adjustments and a Matte finish
Designed, Machined and Assembled in the USA. 100% Waterproof, fogproof, shockproof, and backed by Leupold's legendary customer care
Leupold's Advanced Optical System provides reliable light transmission for long periods of glassing, leading glare reduction in bright conditions, and the clear resolution that recreational athletes require.