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: 41

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

Balance rank	Winrate	Pickrate	Contest Rate
52.6	71.0	33.9	34.7

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Dark Willow	27	65.85%	100.00	27.18	18	77.78%	6.0	9	77.78%	1.8
Centaur Warrunner	33	80.49%	79.74	55.67	19	63.16%	6.3	14	57.14%	2.8
Weaver	36	87.80%	79.00	60.99	18	55.56%	6.0	18	66.67%	3.6
Clockwerk	41	100.00%	77.04	70.20	14	64.29%	4.7	27	48.15%	5.4
Razor	15	36.59%	72.64	27.46	9	77.78%	3.0	6	50.00%	1.2
Chen	18	43.90%	71.51	32.60	4	100.00%	1.3	14	50.00%	2.8
Doom	19	46.34%	70.33	37.89	7	71.43%	2.3	12	58.33%	2.4
Treant Protector	4	9.76%	67.09	0.00	3	100.00%	1.0	1	100.00%	0.2
Templar Assassin	39	95.12%	66.51	79.39	5	40.00%	1.7	34	52.94%	6.8
Pudge	11	26.83%	65.64	18.63	4	75.00%	1.3	7	71.43%	1.4
Phoenix	38	92.68%	65.61	78.86	6	50.00%	2.0	32	50.00%	6.4
Vengeful Spirit	29	70.73%	65.44	64.17	10	40.00%	3.3	19	68.42%	3.8
Shadow Fiend	37	90.24%	62.81	80.71	8	62.50%	2.7	29	41.38%	5.8
Lifestealer	34	82.93%	62.36	76.02	6	66.67%	2.0	28	42.86%	5.6
Tiny	20	48.78%	58.17	54.83	11	54.55%	3.7	9	55.56%	1.8
Meepo	4	9.76%	57.06	0.00	1	100.00%	0.3	3	100.00%	0.6
Grimstroke	6	14.63%	52.85	8.40	3	66.67%	1.0	3	100.00%	0.6
Outworld Destroyer	17	41.46%	52.67	52.85	9	66.67%	3.0	8	25.00%	1.6
Zeus	3	7.32%	51.99	0.00	2	100.00%	0.7	1	100.00%	0.2
Bane	7	17.07%	51.47	18.14	6	66.67%	2.0	1	100.00%	0.2
Troll Warlord	16	39.02%	51.18	49.73	6	83.33%	2.0	10	20.00%	2.0
Ursa	15	36.59%	50.55	46.68	5	60.00%	1.7	10	50.00%	2.0
Slardar	19	46.34%	49.15	58.63	3	33.33%	1.0	16	56.25%	3.2
Storm Spirit	31	75.61%	48.88	88.06	10	40.00%	3.3	21	42.86%	4.2
Dragon Knight	24	58.54%	48.44	76.06	14	50.00%	4.7	10	30.00%	2.0
Windranger	7	17.07%	48.25	15.44	3	66.67%	1.0	4	75.00%	0.8
Keeper of the Light	19	46.34%	48.15	58.33	1	100.00%	0.3	18	44.44%	3.6
Pangolier	10	24.39%	47.93	36.84	9	55.56%	3.0	1	100.00%	0.2
Brewmaster	18	43.90%	47.19	62.03	9	44.44%	3.0	9	55.56%	1.8
Chaos Knight	22	53.66%	46.38	71.99	7	42.86%	2.3	15	46.67%	3.0
Tinker	9	21.95%	46.09	24.16	2	100.00%	0.7	7	42.86%	1.4
Faceless Void	3	7.32%	45.59	0.00	1	100.00%	0.3	2	100.00%	0.4
Mars	11	26.83%	44.93	35.95	3	66.67%	1.0	8	50.00%	1.6
Naga Siren	8	19.51%	44.82	18.38	1	100.00%	0.3	7	57.14%	1.4
Witch Doctor	30	73.17%	42.16	94.72	8	25.00%	2.7	22	45.45%	4.4
Ancient Apparition	2	4.88%	40.05	0.00	2	100.00%	0.7	0	0.00%	0.0
Shadow Demon	10	24.39%	39.45	37.53	3	33.33%	1.0	7	71.43%	1.4
Winter Wyvern	11	26.83%	37.15	51.81	8	50.00%	2.7	3	33.33%	0.6
Dark Seer	23	56.10%	36.51	88.00	7	57.14%	2.3	16	18.75%	3.2
Earth Spirit	9	21.95%	36.02	43.64	7	57.14%	2.3	2	0.00%	0.4
Enchantress	12	29.27%	35.93	57.13	8	50.00%	2.7	4	25.00%	0.8
Night Stalker	19	46.34%	34.66	80.46	8	25.00%	2.7	11	54.55%	2.2
Hoodwink	5	12.20%	34.09	21.50	5	60.00%	1.7	0	0.00%	0.0
Anti-Mage	2	4.88%	32.83	0.00	1	100.00%	0.3	1	100.00%	0.2
Wraith King	2	4.88%	32.83	0.00	1	100.00%	0.3	1	100.00%	0.2
Void Spirit	4	9.76%	29.88	10.89	2	50.00%	0.7	2	100.00%	0.4
Broodmother	4	9.76%	29.18	4.91	0	0.00%	0.0	4	75.00%	0.8
Io	12	29.27%	28.55	60.53	3	33.33%	1.0	9	44.44%	1.8
Tusk	3	7.32%	27.19	9.80	3	66.67%	1.0	0	0.00%	0.0
Crystal Maiden	13	31.71%	27.11	74.90	10	30.00%	3.3	3	66.67%	0.6
Rubick	6	14.63%	27.03	32.49	4	50.00%	1.3	2	50.00%	0.4
Leshrac	15	36.59%	25.93	83.30	10	30.00%	3.3	5	40.00%	1.0
Muerta	8	19.51%	24.70	53.86	7	42.86%	2.3	1	0.00%	0.2
Nyx Assassin	8	19.51%	24.38	48.04	4	25.00%	1.3	4	75.00%	0.8
Pugna	6	14.63%	24.31	38.59	5	40.00%	1.7	1	100.00%	0.2
Marci	6	14.63%	24.31	38.59	5	40.00%	1.7	1	100.00%	0.2
Ogre Magi	1	2.44%	19.27	0.00	1	100.00%	0.3	0	0.00%	0.0
Lycan	1	2.44%	19.27	0.00	1	100.00%	0.3	0	0.00%	0.0
Silencer	1	2.44%	19.27	0.00	1	100.00%	0.3	0	0.00%	0.0
Drow Ranger	1	2.44%	19.27	0.00	1	100.00%	0.3	0	0.00%	0.0
Beastmaster	10	24.39%	17.36	68.40	3	33.33%	1.0	7	28.57%	1.4
Puck	7	17.07%	16.44	44.41	1	0.00%	0.3	6	50.00%	1.2
Axe	7	17.07%	14.49	51.40	2	0.00%	0.7	5	60.00%	1.0
Huskar	3	7.32%	12.57	15.23	1	100.00%	0.3	2	0.00%	0.4
Gyrocopter	13	31.71%	11.70	100.00	8	12.50%	2.7	5	40.00%	1.0
Venomancer	4	9.76%	11.09	26.82	1	0.00%	0.3	3	66.67%	0.6
Timbersaw	12	29.27%	10.69	91.65	3	0.00%	1.0	9	33.33%	1.8
Bristleback	3	7.32%	9.89	24.38	2	50.00%	0.7	1	0.00%	0.2
Enigma	6	14.63%	9.16	49.66	1	0.00%	0.3	5	40.00%	1.0
Jakiro	3	7.32%	8.15	32.69	3	33.33%	1.0	0	0.00%	0.0
Shadow Shaman	5	12.20%	5.81	65.54	5	20.00%	1.7	0	0.00%	0.0
Bloodseeker	3	7.32%	4.85	20.91	0	0.00%	0.0	3	33.33%	0.6
Batrider	2	4.88%	4.15	18.04	1	0.00%	0.3	1	100.00%	0.2
Legion Commander	2	4.88%	4.15	18.04	1	0.00%	0.3	1	100.00%	0.2
Arc Warden	2	4.88%	4.15	18.04	1	0.00%	0.3	1	100.00%	0.2
Snapfire	2	4.88%	4.15	18.04	1	0.00%	0.3	1	100.00%	0.2
Clinkz	4	9.76%	3.25	44.79	1	0.00%	0.3	3	33.33%	0.6
Morphling	3	7.32%	2.87	40.68	2	0.00%	0.7	1	100.00%	0.2
Primal Beast	4	9.76%	2.70	52.99	2	0.00%	0.7	2	50.00%	0.4
Ember Spirit	5	12.20%	1.98	75.51	4	0.00%	1.3	1	100.00%	0.2
Terrorblade	2	4.88%	0.00	48.15	2	0.00%	0.7	0	0.00%	0.0
Medusa	1	2.44%	0.00	23.16	1	0.00%	0.3	0	0.00%	0.0
Disruptor	1	2.44%	0.00	23.16	1	0.00%	0.3	0	0.00%	0.0
Invoker	1	2.44%	0.00	23.16	1	0.00%	0.3	0	0.00%	0.0
Spirit Breaker	1	2.44%	0.00	23.16	1	0.00%	0.3	0	0.00%	0.0
Lina	1	2.44%	0.00	23.16	1	0.00%	0.3	0	0.00%	0.0
Luna	1	2.44%	0.00	23.16	1	0.00%	0.3	0	0.00%	0.0
Nature's Prophet	1	2.44%	0.00	23.16	1	0.00%	0.3	0	0.00%	0.0
Earthshaker	1	2.44%	0.00	12.62	0	0.00%	0.0	1	0.00%	0.2
Kunkka	1	2.44%	0.00	23.16	1	0.00%	0.3	0	0.00%	0.0
Oracle	2	4.88%	0.00	48.15	2	0.00%	0.7	0	0.00%	0.0
Slark	2	4.88%	0.00	29.00	0	0.00%	0.0	2	0.00%	0.4
Lion	2	4.88%	0.00	48.15	2	0.00%	0.7	0	0.00%	0.0
Viper	2	4.88%	0.00	39.46	1	0.00%	0.3	1	0.00%	0.2
Monkey King	1	2.44%	0.00	12.62	0	0.00%	0.0	1	0.00%	0.2