Volibear Runes explained
There's one set of runes for Volibear on patch
11.19
that is the clear favorite for LoL players and pros alike. The best Volibear Runes on the position 
Jungle are Precision as the primary path and
Sorcery as the secondary path with a pick rate of 55%. Besides runes you should take a look on Volibear Build and if you are interested in pro matches take a look at Volibear Probuilds. If you want to discuss
Volibear then you should visit the champion subreddit.
Primary path on Volibear
Precision improves attack and sustained damage on Volibear troughout the match. Most of high elo players – and our LoL pros in the the major regions – have agreed that
Press the Attack is the best keystone rune to run on
Volibear. Volibear has a very easy time activating this rune with basic attacks which synergises well with
Press the Attack’s damage increase once activated. This is usually followed up by taking
Triumph,
Legend: Tenacity and
Coup de Grace.
Triumph restores on Volibear a part of missing health and award bonus gold, if a champion is killed. Volibear gains extra Tenacity with every additional stage of
Legend: Tenacity. Volibear deals with
Coup de Grace more damage to targets with low health.
Secondary path on Volibear
When it comes to your secondary path, most
Volibear players prefer to go with
Sorcery.
Sorcery empoweres abilities of Volibear and increases the available champion resources. On the
Sorcery path, the best runes for Volibear are
Nimbus Cloak and
Waterwalking.
Nimbus Cloak, which grants movement speed upon using a summoner spell, works amazingly well with junglers in particular as they take the shortest cooldown summoner spell,
Waterwalking grants movement speed in the river, which helps Volibear get around the map quicker. The extra damage will also help in those all important dragon and baron fights.