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): 5 - Median hero bans (mb): 7 - Matches: 66

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

Balance rank	Winrate	Pickrate	Contest Rate
64.1	81.0	48.3	45.0

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Timbersaw	53	80.30%	100.00	60.00	8	62.50%	1.6	45	66.67%	6.4
Grimstroke	48	72.73%	99.05	71.43	35	60.00%	7.0	13	61.54%	1.9
Oracle	15	22.73%	98.10	19.05	8	75.00%	1.6	7	85.71%	1.0
Elder Titan	20	30.30%	97.14	36.19	14	78.57%	2.8	6	33.33%	0.9
Puck	63	95.45%	96.19	87.62	19	68.42%	3.8	44	40.91%	6.3
Lifestealer	27	40.91%	95.24	45.71	8	62.50%	1.6	19	68.42%	2.7
Tusk	28	42.42%	94.29	49.52	21	61.90%	4.2	7	71.43%	1.0
Ember Spirit	31	46.97%	93.33	54.29	19	68.42%	3.8	12	41.67%	1.7
Medusa	37	56.06%	92.38	66.67	6	66.67%	1.2	31	54.84%	4.4
Storm Spirit	35	53.03%	91.43	64.76	13	61.54%	2.6	22	54.55%	3.1
Clockwerk	21	31.82%	90.48	42.86	13	69.23%	2.6	8	50.00%	1.1
Broodmother	17	25.76%	89.52	31.43	3	66.67%	0.6	14	71.43%	2.0
Morphling	36	54.55%	88.57	70.48	10	70.00%	2.0	26	46.15%	3.7
Ursa	38	57.58%	87.62	76.19	11	54.55%	2.2	27	51.85%	3.9
Alchemist	13	19.70%	86.67	28.57	7	71.43%	1.4	6	66.67%	0.9
Necrophos	4	6.06%	85.71	4.76	3	100.00%	0.6	1	100.00%	0.1
Monkey King	29	43.94%	84.76	63.81	7	57.14%	1.4	22	54.55%	3.1
Gyrocopter	17	25.76%	83.81	40.95	10	60.00%	2.0	7	71.43%	1.0
Troll Warlord	43	65.15%	82.86	86.67	10	30.00%	2.0	33	60.61%	4.7
Beastmaster	36	54.55%	81.90	78.10	3	66.67%	0.6	33	48.48%	4.7
Snapfire	35	53.03%	80.95	81.90	25	48.00%	5.0	10	60.00%	1.4
Viper	21	31.82%	80.00	50.48	5	100.00%	1.0	16	31.25%	2.3
Void Spirit	21	31.82%	79.05	57.14	10	50.00%	2.0	11	63.64%	1.6
Death Prophet	35	53.03%	78.10	83.81	11	63.64%	2.2	24	33.33%	3.4
Enchantress	17	25.76%	77.14	51.43	10	70.00%	2.0	7	14.29%	1.0
Centaur Warrunner	37	56.06%	76.19	90.48	15	46.67%	3.0	22	40.91%	3.1
Leshrac	25	37.88%	75.24	77.14	13	38.46%	2.6	12	66.67%	1.7
Juggernaut	35	53.03%	74.29	93.33	15	40.00%	3.0	20	45.00%	2.9
Axe	15	22.73%	73.33	48.57	7	57.14%	1.4	8	50.00%	1.1
Doom	14	21.21%	72.38	47.62	6	50.00%	1.2	8	62.50%	1.1
Phoenix	26	39.39%	71.43	82.86	10	40.00%	2.0	16	50.00%	2.3
Bristleback	15	22.73%	70.48	53.33	8	50.00%	1.6	7	57.14%	1.0
Earth Spirit	22	33.33%	69.52	80.00	16	43.75%	3.2	6	50.00%	0.9
Pangolier	15	22.73%	68.57	52.38	6	66.67%	1.2	9	33.33%	1.3
Luna	16	24.24%	67.62	60.95	8	50.00%	1.6	8	50.00%	1.1
Phantom Lancer	17	25.76%	66.67	59.05	5	40.00%	1.0	12	58.33%	1.7
Dark Seer	11	16.67%	65.71	39.05	3	33.33%	0.6	8	75.00%	1.1
Razor	21	31.82%	64.76	74.29	6	50.00%	1.2	15	40.00%	2.1
Mars	30	45.45%	63.81	94.29	9	22.22%	1.8	21	52.38%	3.0
Lion	31	46.97%	62.86	98.10	24	33.33%	4.8	7	57.14%	1.0
Templar Assassin	12	18.18%	61.90	44.76	3	66.67%	0.6	9	44.44%	1.3
Abaddon	22	33.33%	60.95	85.71	15	33.33%	3.0	7	71.43%	1.0
Tiny	32	48.48%	60.00	97.14	15	26.67%	3.0	17	52.94%	2.4
Crystal Maiden	2	3.03%	59.05	0.95	2	100.00%	0.4	0	0.00%	0.0
Visage	2	3.03%	59.05	2.86	2	100.00%	0.4	0	0.00%	0.0
Slark	8	12.12%	57.14	33.33	4	75.00%	0.8	4	25.00%	0.6
Legion Commander	24	36.36%	56.19	89.52	10	40.00%	2.0	14	35.71%	2.0
Huskar	16	24.24%	55.24	65.71	4	25.00%	0.8	12	58.33%	1.7
Kunkka	8	12.12%	54.29	27.62	2	100.00%	0.4	6	33.33%	0.9
Ogre Magi	11	16.67%	53.33	55.24	10	50.00%	2.0	1	0.00%	0.1
Meepo	4	6.06%	52.38	8.57	1	100.00%	0.2	3	66.67%	0.4
Omniknight	4	6.06%	51.43	11.43	3	66.67%	0.6	1	100.00%	0.1
Dragon Knight	14	21.21%	50.48	68.57	7	28.57%	1.4	7	71.43%	1.0
Bloodseeker	17	25.76%	49.52	79.05	8	50.00%	1.6	9	22.22%	1.3
Chaos Knight	3	4.55%	48.57	7.62	2	100.00%	0.4	1	0.00%	0.1
Night Stalker	3	4.55%	48.57	7.62	2	100.00%	0.4	1	0.00%	0.1
Lina	7	10.61%	46.67	35.24	4	50.00%	0.8	3	66.67%	0.4
Sven	5	7.58%	45.71	18.10	3	66.67%	0.6	2	50.00%	0.3
Ancient Apparition	2	3.03%	44.76	5.71	1	100.00%	0.2	1	100.00%	0.1
Riki	12	18.18%	43.81	58.10	4	50.00%	0.8	8	37.50%	1.1
Nyx Assassin	14	21.21%	42.86	73.33	6	33.33%	1.2	8	50.00%	1.1
Invoker	7	10.61%	41.90	30.48	2	50.00%	0.4	5	60.00%	0.7
Mirana	18	27.27%	40.95	88.57	11	27.27%	2.2	7	57.14%	1.0
Dark Willow	4	6.06%	40.00	13.33	2	50.00%	0.4	2	100.00%	0.3
Queen of Pain	8	12.12%	39.05	40.00	2	50.00%	0.4	6	50.00%	0.9
Underlord	4	6.06%	38.10	9.52	0	0.00%	0.0	4	75.00%	0.6
Outworld Destroyer	6	9.09%	37.14	21.90	1	0.00%	0.2	5	80.00%	0.7
Earthshaker	3	4.55%	36.19	12.38	3	66.67%	0.6	0	0.00%	0.0
Faceless Void	20	30.30%	35.24	95.24	6	50.00%	1.2	14	14.29%	2.0
Wraith King	10	15.15%	34.29	61.90	5	20.00%	1.0	5	80.00%	0.7
Phantom Assassin	8	12.12%	33.33	43.81	3	33.33%	0.6	5	60.00%	0.7
Slardar	10	15.15%	32.38	62.86	5	40.00%	1.0	5	40.00%	0.7
Spectre	7	10.61%	31.43	34.29	1	0.00%	0.2	6	66.67%	0.9
Windranger	7	10.61%	30.48	41.90	4	50.00%	0.8	3	33.33%	0.4
Treant Protector	4	6.06%	29.52	29.52	4	50.00%	0.8	0	0.00%	0.0
Shadow Demon	3	4.55%	28.57	14.29	2	50.00%	0.4	1	100.00%	0.1
Witch Doctor	1	1.52%	27.62	1.90	1	100.00%	0.2	0	0.00%	0.0
Drow Ranger	1	1.52%	27.62	3.81	1	100.00%	0.2	0	0.00%	0.0
Io	12	18.18%	25.71	72.38	0	0.00%	0.0	12	33.33%	1.7
Sand King	14	21.21%	24.76	92.38	8	12.50%	1.6	6	66.67%	0.9
Batrider	12	18.18%	23.81	75.24	1	0.00%	0.2	11	36.36%	1.6
Anti-Mage	14	21.21%	22.86	91.43	5	0.00%	1.0	9	55.56%	1.3
Rubick	9	13.64%	21.90	84.76	7	28.57%	1.4	2	0.00%	0.3
Tidehunter	15	22.73%	20.95	99.05	5	20.00%	1.0	10	20.00%	1.4
Shadow Shaman	7	10.61%	20.00	69.52	4	25.00%	0.8	3	33.33%	0.4
Warlock	2	3.03%	19.05	17.14	2	50.00%	0.4	0	0.00%	0.0
Brewmaster	2	3.03%	19.05	17.14	2	50.00%	0.4	0	0.00%	0.0
Nature's Prophet	3	4.55%	17.14	26.67	2	50.00%	0.4	1	0.00%	0.1
Keeper of the Light	3	4.55%	16.19	38.10	3	33.33%	0.6	0	0.00%	0.0
Skywrath Mage	3	4.55%	16.19	38.10	3	33.33%	0.6	0	0.00%	0.0
Techies	2	3.03%	14.29	10.48	0	0.00%	0.0	2	50.00%	0.3
Magnus	10	15.15%	13.33	96.19	4	0.00%	0.8	6	33.33%	0.9
Naga Siren	3	4.55%	12.38	20.95	0	0.00%	0.0	3	33.33%	0.4
Lycan	2	3.03%	11.43	20.00	1	0.00%	0.2	1	100.00%	0.1
Venomancer	5	7.58%	10.48	80.95	4	0.00%	0.8	1	100.00%	0.1
Zeus	1	1.52%	9.52	15.24	0	0.00%	0.0	1	0.00%	0.1
Winter Wyvern	1	1.52%	8.57	25.71	1	0.00%	0.2	0	0.00%	0.0
Spirit Breaker	1	1.52%	8.57	25.71	1	0.00%	0.2	0	0.00%	0.0
Terrorblade	9	13.64%	6.67	100.00	1	0.00%	0.2	8	0.00%	1.1
Hoodwink	1	1.52%	5.71	25.71	1	0.00%	0.2	0	0.00%	0.0
Enigma	2	3.03%	4.76	32.38	0	0.00%	0.0	2	0.00%	0.3
Weaver	3	4.55%	3.81	46.67	0	0.00%	0.0	3	0.00%	0.4
Undying	3	4.55%	2.86	67.62	2	0.00%	0.4	1	0.00%	0.1
Pugna	3	4.55%	1.90	56.19	1	0.00%	0.2	2	0.00%	0.3
Dazzle	1	1.52%	0.95	25.71	1	0.00%	0.2	0	0.00%	0.0