Explain this to me

This table contains stats for heroes' picks and bans.
Rank is used to sort heroes by winrate, taking number of their picks and bans into account. Higher rank means the hero is stronger. Rev-Rank (Reverse Rank) is used to show the least effective heroes with the most number of matches.
Balance metric estimates how balanced the meta is (0 to 100)

Median hero picks (mp): 3 - Median hero bans (mb): 5 - Matches: 33

Remove low picks (0.9mp) Remove low bans (0.9mb)

Balance rank	Winrate	Pickrate	Contest Rate
46.9	56.6	40.2	31.1

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Viper	27	81.82%	100.00	63.10	7	85.71%	2.3	20	55.00%	4.0
Zeus	28	84.85%	98.81	66.67	15	60.00%	5.0	13	76.92%	2.6
Tiny	32	96.97%	97.62	82.14	24	62.50%	8.0	8	37.50%	1.6
Bristleback	31	93.94%	96.43	80.95	12	58.33%	4.0	19	57.89%	3.8
Puck	33	100.00%	95.24	89.29	11	63.64%	3.7	22	45.45%	4.4
Enigma	20	60.61%	94.05	65.48	6	66.67%	2.0	14	57.14%	2.8
Chen	16	48.48%	92.86	48.81	10	80.00%	3.3	6	16.67%	1.2
Timbersaw	18	54.55%	91.67	57.14	6	66.67%	2.0	12	58.33%	2.4
Night Stalker	14	42.42%	90.48	41.67	4	75.00%	1.3	10	60.00%	2.0
Marci	31	93.94%	89.29	91.67	15	40.00%	5.0	16	68.75%	3.2
Kunkka	7	21.21%	88.10	14.29	3	66.67%	1.0	4	100.00%	0.8
Death Prophet	16	48.48%	86.90	59.52	4	75.00%	1.3	12	50.00%	2.4
Alchemist	13	39.39%	85.71	46.43	6	66.67%	2.0	7	57.14%	1.4
Io	18	54.55%	84.52	73.81	6	66.67%	2.0	12	41.67%	2.4
Beastmaster	20	60.61%	83.33	78.57	7	57.14%	2.3	13	46.15%	2.6
Faceless Void	10	30.30%	82.14	38.10	2	100.00%	0.7	8	50.00%	1.6
Slardar	3	9.09%	80.95	9.52	2	100.00%	0.7	1	100.00%	0.2
Lycan	8	24.24%	79.76	23.81	2	50.00%	0.7	6	83.33%	1.2
Batrider	19	57.58%	78.57	83.33	5	80.00%	1.7	14	28.57%	2.8
Juggernaut	13	39.39%	77.38	54.76	3	33.33%	1.0	10	70.00%	2.0
Keeper of the Light	15	45.45%	76.19	72.62	8	50.00%	2.7	7	57.14%	1.4
Bloodseeker	22	66.67%	75.00	90.48	6	66.67%	2.0	16	31.25%	3.2
Skywrath Mage	5	15.15%	73.81	10.71	1	100.00%	0.3	4	75.00%	0.8
Dawnbreaker	27	81.82%	72.62	96.43	14	35.71%	4.7	13	53.85%	2.6
Visage	12	36.36%	71.43	61.90	6	66.67%	2.0	6	33.33%	1.2
Centaur Warrunner	3	9.09%	70.24	4.76	1	100.00%	0.3	2	100.00%	0.4
Warlock	10	30.30%	69.05	51.19	6	66.67%	2.0	4	25.00%	0.8
Weaver	10	30.30%	67.86	44.05	2	50.00%	0.7	8	62.50%	1.6
Winter Wyvern	21	63.64%	66.67	94.05	8	37.50%	2.7	13	46.15%	2.6
Brewmaster	11	33.33%	65.48	58.33	4	50.00%	1.3	7	57.14%	1.4
Clockwerk	13	39.39%	64.29	76.19	6	66.67%	2.0	7	14.29%	1.4
Enchantress	19	57.58%	63.10	95.24	7	28.57%	2.3	12	50.00%	2.4
Razor	27	81.82%	61.90	100.00	9	33.33%	3.0	18	33.33%	3.6
Nature's Prophet	18	54.55%	60.71	92.86	5	40.00%	1.7	13	38.46%	2.6
Void Spirit	15	45.45%	59.52	86.90	7	28.57%	2.3	8	62.50%	1.6
Chaos Knight	10	30.30%	58.33	60.71	2	50.00%	0.7	8	50.00%	1.6
Shadow Shaman	2	6.06%	57.14	3.57	1	100.00%	0.3	1	100.00%	0.2
Ember Spirit	14	42.42%	55.95	85.71	4	25.00%	1.3	10	50.00%	2.0
Crystal Maiden	9	27.27%	54.76	71.43	7	42.86%	2.3	2	50.00%	0.4
Monkey King	7	21.21%	53.57	47.62	3	33.33%	1.0	4	75.00%	0.8
Nyx Assassin	5	15.15%	52.38	26.19	2	50.00%	0.7	3	66.67%	0.6
Necrophos	8	24.24%	51.19	55.95	1	0.00%	0.3	7	57.14%	1.4
Ancient Apparition	2	6.06%	50.00	1.19	0	0.00%	0.0	2	100.00%	0.4
Doom	4	12.12%	48.81	22.62	1	100.00%	0.3	3	33.33%	0.6
Dazzle	14	42.42%	47.62	97.62	10	30.00%	3.3	4	25.00%	0.8
Lifestealer	6	18.18%	46.43	50.00	3	33.33%	1.0	3	66.67%	0.6
Hoodwink	6	18.18%	45.24	64.29	4	25.00%	1.3	2	100.00%	0.4
Bane	1	3.03%	44.05	8.33	1	100.00%	0.3	0	0.00%	0.0
Witch Doctor	1	3.03%	44.05	8.33	1	100.00%	0.3	0	0.00%	0.0
Storm Spirit	4	12.12%	41.67	27.38	2	50.00%	0.7	2	50.00%	0.4
Sniper	5	15.15%	40.48	45.24	2	50.00%	0.7	3	33.33%	0.6
Luna	2	6.06%	39.29	11.90	1	100.00%	0.3	1	0.00%	0.2
Leshrac	4	12.12%	38.10	25.00	0	0.00%	0.0	4	50.00%	0.8
Templar Assassin	6	18.18%	36.90	77.38	4	25.00%	1.3	2	50.00%	0.4
Ursa	4	12.12%	35.71	40.48	1	0.00%	0.3	3	66.67%	0.6
Terrorblade	4	12.12%	35.71	40.48	1	0.00%	0.3	3	66.67%	0.6
Gyrocopter	2	6.06%	33.33	21.43	2	50.00%	0.7	0	0.00%	0.0
Sven	2	6.06%	33.33	21.43	2	50.00%	0.7	0	0.00%	0.0
Underlord	2	6.06%	33.33	21.43	2	50.00%	0.7	0	0.00%	0.0
Mirana	1	3.03%	29.76	5.95	0	0.00%	0.0	1	100.00%	0.2
Phantom Assassin	1	3.03%	29.76	2.38	0	0.00%	0.0	1	100.00%	0.2
Invoker	5	15.15%	27.38	52.38	1	100.00%	0.3	4	0.00%	0.8
Bounty Hunter	10	30.30%	26.19	98.81	5	20.00%	1.7	5	20.00%	1.0
Queen of Pain	6	18.18%	25.00	70.24	1	100.00%	0.3	5	0.00%	1.0
Snapfire	5	15.15%	23.81	75.00	3	33.33%	1.0	2	0.00%	0.4
Phoenix	6	18.18%	22.62	84.52	3	0.00%	1.0	3	66.67%	0.6
Dark Seer	2	6.06%	21.43	13.10	0	0.00%	0.0	2	50.00%	0.4
Treant Protector	3	9.09%	20.24	42.86	1	0.00%	0.3	2	50.00%	0.4
Dragon Knight	4	12.12%	19.05	79.76	3	0.00%	1.0	1	100.00%	0.2
Arc Warden	1	3.03%	17.86	36.90	1	0.00%	0.3	0	0.00%	0.0
Earthshaker	1	3.03%	17.86	36.90	1	0.00%	0.3	0	0.00%	0.0
Sand King	1	3.03%	17.86	36.90	1	0.00%	0.3	0	0.00%	0.0
Windranger	1	3.03%	17.86	36.90	1	0.00%	0.3	0	0.00%	0.0
Jakiro	1	3.03%	17.86	36.90	1	0.00%	0.3	0	0.00%	0.0
Lone Druid	1	3.03%	17.86	36.90	1	0.00%	0.3	0	0.00%	0.0
Huskar	1	3.03%	10.71	17.86	0	0.00%	0.0	1	0.00%	0.2
Pangolier	1	3.03%	9.52	36.90	1	0.00%	0.3	0	0.00%	0.0
Grimstroke	1	3.03%	9.52	36.90	1	0.00%	0.3	0	0.00%	0.0
Wraith King	1	3.03%	7.14	17.86	0	0.00%	0.0	1	0.00%	0.2
Mars	2	6.06%	5.95	69.05	2	0.00%	0.7	0	0.00%	0.0
Morphling	2	6.06%	4.76	53.57	1	0.00%	0.3	1	0.00%	0.2
Pudge	2	6.06%	3.57	69.05	2	0.00%	0.7	0	0.00%	0.0
Tusk	1	3.03%	2.38	17.86	0	0.00%	0.0	1	0.00%	0.2
Rubick	3	9.09%	1.19	89.29	3	0.00%	1.0	0	0.00%	0.0