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): 7 - Median hero bans (mb): 10 - Matches: 125

Balance rank	Winrate	Pickrate	Contest Rate
71.2	90.1	59.5	38.0

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Queen of Pain	96	76.80%	100.00	71.17	46	58.70%	6.6	50	62.00%	5.0
Bane	79	63.20%	99.10	68.47	50	62.00%	7.1	29	51.72%	2.9
Void Spirit	27	21.60%	98.20	30.63	14	71.43%	2.0	13	69.23%	1.3
Dark Seer	29	23.20%	97.30	31.53	11	72.73%	1.6	18	66.67%	1.8
Beastmaster	97	77.60%	96.40	84.68	24	54.17%	3.4	73	53.42%	7.3
Phantom Assassin	65	52.00%	95.50	69.37	26	61.54%	3.7	39	51.28%	3.9
Outworld Destroyer	70	56.00%	94.59	76.58	19	63.16%	2.7	51	49.02%	5.1
Kunkka	80	64.00%	93.69	80.18	35	54.29%	5.0	45	51.11%	4.5
Weaver	100	80.00%	92.79	93.69	39	38.46%	5.6	61	63.93%	6.1
Timbersaw	46	36.80%	91.89	53.15	11	63.64%	1.6	35	57.14%	3.5
Ember Spirit	55	44.00%	90.99	66.67	18	55.56%	2.6	37	56.76%	3.7
Tidehunter	50	40.00%	90.09	61.26	15	66.67%	2.1	35	48.57%	3.5
Earth Spirit	9	7.20%	89.19	10.81	8	87.50%	1.1	1	0.00%	0.1
Puck	75	60.00%	88.29	85.59	31	48.39%	4.4	44	54.55%	4.4
Razor	81	64.80%	87.39	90.99	33	54.55%	4.7	48	41.67%	4.8
Batrider	35	28.00%	86.49	47.75	7	71.43%	1.0	28	53.57%	2.8
Morphling	54	43.20%	85.59	72.97	10	40.00%	1.4	44	59.09%	4.4
Invoker	83	66.40%	84.68	92.79	25	56.00%	3.6	58	41.38%	5.8
Io	118	94.40%	83.78	99.10	28	39.29%	4.0	90	46.67%	9.0
Wraith King	54	43.20%	82.88	78.38	29	51.72%	4.1	25	52.00%	2.5
Spirit Breaker	98	78.40%	81.98	96.40	48	41.67%	6.9	50	52.00%	5.0
Nyx Assassin	51	40.80%	81.08	77.48	36	55.56%	5.1	15	33.33%	1.5
Grimstroke	40	32.00%	80.18	65.77	27	51.85%	3.9	13	61.54%	1.3
Death Prophet	17	13.60%	79.28	27.93	10	70.00%	1.4	7	57.14%	0.7
Lycan	26	20.80%	78.38	38.74	7	71.43%	1.0	19	52.63%	1.9
Snapfire	68	54.40%	77.48	91.89	45	44.44%	6.4	23	56.52%	2.3
Templar Assassin	38	30.40%	76.58	60.36	8	75.00%	1.1	30	43.33%	3.0
Mars	87	69.60%	75.68	97.30	37	37.84%	5.3	50	52.00%	5.0
Lina	59	47.20%	74.77	89.19	16	31.25%	2.3	43	58.14%	4.3
Mirana	9	7.20%	73.87	18.02	7	85.71%	1.0	2	0.00%	0.2
Clockwerk	22	17.60%	72.97	43.24	16	62.50%	2.3	6	33.33%	0.6
Enigma	10	8.00%	72.07	14.41	3	100.00%	0.4	7	57.14%	0.7
Medusa	54	43.20%	71.17	83.78	14	42.86%	2.0	40	50.00%	4.0
Luna	55	44.00%	70.27	90.09	24	29.17%	3.4	31	70.97%	3.1
Broodmother	22	17.60%	69.37	39.64	4	100.00%	0.6	18	38.89%	1.8
Bristleback	4	3.20%	68.47	8.11	2	100.00%	0.3	2	100.00%	0.2
Juggernaut	11	8.80%	67.57	25.23	7	71.43%	1.0	4	50.00%	0.4
Storm Spirit	45	36.00%	66.67	87.39	22	40.91%	3.1	23	52.17%	2.3
Jakiro	22	17.60%	65.77	54.95	17	52.94%	2.4	5	40.00%	0.5
Monkey King	59	47.20%	64.86	95.50	17	41.18%	2.4	42	40.48%	4.2
Treant Protector	26	20.80%	63.96	64.86	19	47.37%	2.7	7	57.14%	0.7
Abaddon	17	13.60%	63.06	37.84	6	50.00%	0.9	11	63.64%	1.1
Bloodseeker	28	22.40%	62.16	63.96	9	66.67%	1.3	19	31.58%	1.9
Faceless Void	34	27.20%	61.26	74.77	5	60.00%	0.7	29	41.38%	2.9
Viper	18	14.40%	60.36	41.44	6	50.00%	0.9	12	58.33%	1.2
Ursa	28	22.40%	59.46	67.57	8	37.50%	1.1	20	55.00%	2.0
Disruptor	35	28.00%	58.56	88.29	29	44.83%	4.1	6	16.67%	0.6
Legion Commander	22	17.60%	57.66	52.25	6	50.00%	0.9	16	50.00%	1.6
Drow Ranger	24	19.20%	56.76	58.56	7	57.14%	1.0	17	41.18%	1.7
Terrorblade	47	37.60%	55.86	94.59	11	36.36%	1.6	36	41.67%	3.6
Doom	37	29.60%	54.95	86.49	13	38.46%	1.9	24	45.83%	2.4
Enchantress	18	14.40%	54.05	44.14	5	60.00%	0.7	13	46.15%	1.3
Naga Siren	15	12.00%	53.15	40.54	6	66.67%	0.9	9	33.33%	0.9
Hoodwink	22	17.60%	52.25	70.27	14	42.86%	2.0	8	50.00%	0.8
Tinker	20	16.00%	51.35	54.05	5	80.00%	0.7	15	26.67%	1.5
Leshrac	17	13.60%	50.45	46.85	5	60.00%	0.7	12	41.67%	1.2
Shadow Demon	26	20.80%	49.55	79.28	16	43.75%	2.3	10	30.00%	1.0
Troll Warlord	21	16.80%	48.65	62.16	6	33.33%	0.9	15	53.33%	1.5
Slardar	20	16.00%	47.75	56.76	4	50.00%	0.6	16	43.75%	1.6
Rubick	26	20.80%	46.85	81.98	17	41.18%	2.4	9	33.33%	0.9
Night Stalker	44	35.20%	45.95	98.20	11	27.27%	1.6	33	39.39%	3.3
Dazzle	7	5.60%	45.05	21.62	4	75.00%	0.6	3	33.33%	0.3
Nature's Prophet	13	10.40%	44.14	45.05	8	50.00%	1.1	5	40.00%	0.5
Vengeful Spirit	2	1.60%	43.24	1.80	2	100.00%	0.3	0	0.00%	0.0
Windranger	9	7.20%	42.34	32.43	6	50.00%	0.9	3	66.67%	0.3
Oracle	8	6.40%	41.44	29.73	5	60.00%	0.7	3	33.33%	0.3
Phantom Lancer	24	19.20%	40.54	81.08	6	33.33%	0.9	18	38.89%	1.8
Dark Willow	20	16.00%	39.64	82.88	16	37.50%	2.3	4	25.00%	0.4
Lifestealer	14	11.20%	38.74	48.65	4	50.00%	0.6	10	40.00%	1.0
Pangolier	18	14.40%	37.84	75.68	11	18.18%	1.6	7	100.00%	0.7
Sven	6	4.80%	36.94	19.82	2	50.00%	0.3	4	75.00%	0.4
Lion	14	11.20%	36.04	63.06	11	36.36%	1.6	3	66.67%	0.3
Gyrocopter	11	8.80%	35.14	50.45	10	40.00%	1.4	1	100.00%	0.1
Skywrath Mage	5	4.00%	34.23	18.92	3	66.67%	0.4	2	50.00%	0.2
Earthshaker	2	1.60%	33.33	9.01	1	100.00%	0.1	1	100.00%	0.1
Axe	2	1.60%	33.33	7.21	1	100.00%	0.1	1	100.00%	0.1
Magnus	2	1.60%	33.33	5.41	1	100.00%	0.1	1	100.00%	0.1
Centaur Warrunner	8	6.40%	30.63	36.04	7	42.86%	1.0	1	100.00%	0.1
Dragon Knight	6	4.80%	29.73	24.32	3	66.67%	0.4	3	33.33%	0.3
Venomancer	10	8.00%	28.83	42.34	4	50.00%	0.6	6	33.33%	0.6
Elder Titan	3	2.40%	27.93	13.51	3	66.67%	0.4	0	0.00%	0.0
Pudge	3	2.40%	27.93	13.51	3	66.67%	0.4	0	0.00%	0.0
Warlock	3	2.40%	27.93	13.51	3	66.67%	0.4	0	0.00%	0.0
Shadow Fiend	13	10.40%	25.23	72.07	10	40.00%	1.4	3	0.00%	0.3
Undying	4	3.20%	24.32	20.72	3	66.67%	0.4	1	0.00%	0.1
Huskar	6	4.80%	23.42	26.13	2	50.00%	0.3	4	50.00%	0.4
Sand King	11	8.80%	22.52	59.46	6	16.67%	0.9	5	80.00%	0.5
Phoenix	2	1.60%	21.62	2.70	0	0.00%	0.0	2	100.00%	0.2
Chaos Knight	7	5.60%	20.72	36.94	5	40.00%	0.7	2	50.00%	0.2
Tusk	5	4.00%	19.82	28.83	4	50.00%	0.6	1	0.00%	0.1
Witch Doctor	1	0.80%	18.92	6.31	1	100.00%	0.1	0	0.00%	0.0
Clinkz	1	0.80%	18.92	0.90	1	100.00%	0.1	0	0.00%	0.0
Chen	7	5.60%	17.12	35.14	3	33.33%	0.4	4	50.00%	0.4
Silencer	8	6.40%	16.22	49.55	4	25.00%	0.6	4	50.00%	0.4
Ancient Apparition	5	4.00%	15.32	27.03	2	50.00%	0.3	3	33.33%	0.3
Anti-Mage	9	7.20%	14.41	57.66	4	50.00%	0.6	5	0.00%	0.5
Ogre Magi	6	4.80%	13.51	45.95	6	33.33%	0.9	0	0.00%	0.0
Visage	8	6.40%	12.61	55.86	5	40.00%	0.7	3	0.00%	0.3
Pugna	2	1.60%	11.71	9.91	1	100.00%	0.1	1	0.00%	0.1
Winter Wyvern	5	4.00%	10.81	33.33	3	33.33%	0.4	2	50.00%	0.2
Sniper	3	2.40%	9.91	17.12	1	0.00%	0.1	2	100.00%	0.2
Arc Warden	3	2.40%	9.91	17.12	1	0.00%	0.1	2	100.00%	0.2
Brewmaster	2	1.60%	8.11	15.32	2	50.00%	0.3	0	0.00%	0.0
Spectre	1	0.80%	7.21	4.50	0	0.00%	0.0	1	100.00%	0.1
Lone Druid	1	0.80%	7.21	4.50	0	0.00%	0.0	1	100.00%	0.1
Zeus	4	3.20%	5.41	34.23	3	33.33%	0.4	1	0.00%	0.1
Underlord	12	9.60%	4.50	100.00	8	12.50%	1.1	4	0.00%	0.4
Necrophos	6	4.80%	3.60	73.87	3	0.00%	0.4	3	33.33%	0.3
Slark	3	2.40%	2.70	51.35	2	0.00%	0.3	1	0.00%	0.1
Shadow Shaman	1	0.80%	1.80	22.52	1	0.00%	0.1	0	0.00%	0.0
Keeper of the Light	1	0.80%	1.80	24.32	1	0.00%	0.1	0	0.00%	0.0