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): 6 - Matches: 46

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

Balance rank	Winrate	Pickrate	Contest Rate
58.9	77.6	42.5	35.4

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Venomancer	36	78.26%	100.00	62.37	16	62.50%	5.3	20	80.00%	3.3
Night Stalker	43	93.48%	98.92	73.12	5	60.00%	1.7	38	65.79%	6.3
Razor	28	60.87%	97.85	59.14	10	80.00%	3.3	18	55.56%	3.0
Nyx Assassin	38	82.61%	96.77	80.65	17	52.94%	5.7	21	61.90%	3.5
Clockwerk	45	97.83%	95.70	92.47	20	65.00%	6.7	25	36.00%	4.2
Disruptor	18	39.13%	94.62	56.99	12	58.33%	4.0	6	83.33%	1.0
Templar Assassin	14	30.43%	93.55	39.78	5	60.00%	1.7	9	77.78%	1.5
Faceless Void	17	36.96%	92.47	51.61	8	62.50%	2.7	9	66.67%	1.5
Underlord	6	13.04%	91.40	13.98	3	100.00%	1.0	3	66.67%	0.5
Legion Commander	13	28.26%	90.32	38.71	6	66.67%	2.0	7	71.43%	1.2
Spirit Breaker	12	26.09%	89.25	40.86	10	70.00%	3.3	2	50.00%	0.3
Ancient Apparition	24	52.17%	88.17	75.27	15	60.00%	5.0	9	44.44%	1.5
Sand King	44	95.65%	87.10	95.70	25	48.00%	8.3	19	42.11%	3.2
Io	27	58.70%	86.02	78.49	3	33.33%	1.0	24	58.33%	4.0
Storm Spirit	7	15.22%	84.95	18.28	6	83.33%	2.0	1	0.00%	0.2
Sven	12	26.09%	83.87	41.94	6	83.33%	2.0	6	33.33%	1.0
Queen of Pain	30	65.22%	82.80	87.10	18	50.00%	6.0	12	50.00%	2.0
Slark	4	8.70%	81.72	3.23	1	100.00%	0.3	3	100.00%	0.5
Bloodseeker	22	47.83%	80.65	77.42	9	55.56%	3.0	13	46.15%	2.2
Dragon Knight	26	56.52%	79.57	84.95	11	45.45%	3.7	15	53.33%	2.5
Dark Seer	28	60.87%	78.49	89.25	6	50.00%	2.0	22	45.45%	3.7
Rubick	12	26.09%	77.42	52.69	10	60.00%	3.3	2	50.00%	0.3
Jakiro	12	26.09%	76.34	58.06	12	58.33%	4.0	0	0.00%	0.0
Nature's Prophet	15	32.61%	75.27	70.97	7	42.86%	2.3	8	62.50%	1.3
Lina	15	32.61%	74.19	72.04	7	57.14%	2.3	8	37.50%	1.3
Ursa	10	21.74%	73.12	53.76	8	50.00%	2.7	2	100.00%	0.3
Drow Ranger	21	45.65%	72.04	86.02	6	50.00%	2.0	15	40.00%	2.5
Batrider	18	39.13%	70.97	76.34	3	66.67%	1.0	15	40.00%	2.5
Warlock	10	21.74%	69.89	50.54	6	50.00%	2.0	4	75.00%	0.7
Puck	28	60.87%	68.82	97.85	18	44.44%	6.0	10	20.00%	1.7
Dazzle	4	8.70%	67.74	16.13	4	75.00%	1.3	0	0.00%	0.0
Terrorblade	6	13.04%	66.67	23.66	3	66.67%	1.0	3	66.67%	0.5
Lich	2	4.35%	65.59	12.90	2	100.00%	0.7	0	0.00%	0.0
Beastmaster	2	4.35%	65.59	12.90	2	100.00%	0.7	0	0.00%	0.0
Shadow Shaman	7	15.22%	63.44	43.01	7	57.14%	2.3	0	0.00%	0.0
Lycan	17	36.96%	62.37	88.17	8	37.50%	2.7	9	44.44%	1.5
Treant Protector	16	34.78%	61.29	83.87	6	50.00%	2.0	10	30.00%	1.7
Crystal Maiden	8	17.39%	60.22	63.44	7	42.86%	2.3	1	100.00%	0.2
Slardar	4	8.70%	59.14	17.20	2	50.00%	0.7	2	100.00%	0.3
Broodmother	8	17.39%	58.06	49.46	2	50.00%	0.7	6	50.00%	1.0
Troll Warlord	5	10.87%	56.99	37.63	4	50.00%	1.3	1	100.00%	0.2
Huskar	5	10.87%	55.91	25.81	2	50.00%	0.7	3	66.67%	0.5
Bristleback	17	36.96%	54.84	98.92	11	27.27%	3.7	6	33.33%	1.0
Juggernaut	9	19.57%	53.76	74.19	4	50.00%	1.3	5	20.00%	0.8
Tidehunter	8	17.39%	52.69	69.89	5	40.00%	1.7	3	33.33%	0.5
Meepo	3	6.52%	51.61	19.35	2	50.00%	0.7	1	100.00%	0.2
Enigma	5	10.87%	50.54	36.56	1	100.00%	0.3	4	25.00%	0.7
Wraith King	1	2.17%	49.46	2.15	1	100.00%	0.3	0	0.00%	0.0
Tiny	1	2.17%	49.46	9.68	1	100.00%	0.3	0	0.00%	0.0
Brewmaster	1	2.17%	49.46	2.15	1	100.00%	0.3	0	0.00%	0.0
Riki	1	2.17%	49.46	9.68	1	100.00%	0.3	0	0.00%	0.0
Centaur Warrunner	1	2.17%	49.46	9.68	1	100.00%	0.3	0	0.00%	0.0
Undying	1	2.17%	49.46	9.68	1	100.00%	0.3	0	0.00%	0.0
Doom	1	2.17%	49.46	9.68	1	100.00%	0.3	0	0.00%	0.0
Phantom Assassin	1	2.17%	49.46	9.68	1	100.00%	0.3	0	0.00%	0.0
Earthshaker	22	47.83%	40.86	100.00	16	12.50%	5.3	6	66.67%	1.0
Medusa	4	8.70%	39.78	26.88	2	50.00%	0.7	2	50.00%	0.3
Witch Doctor	5	10.87%	38.71	60.22	5	40.00%	1.7	0	0.00%	0.0
Shadow Fiend	13	28.26%	37.63	96.77	7	28.57%	2.3	6	16.67%	1.0
Chen	6	13.04%	36.56	61.29	2	50.00%	0.7	4	25.00%	0.7
Mirana	5	10.87%	35.48	64.52	4	25.00%	1.3	1	100.00%	0.2
Chaos Knight	10	21.74%	34.41	91.40	2	50.00%	0.7	8	12.50%	1.3
Timbersaw	2	4.35%	33.33	22.58	2	50.00%	0.7	0	0.00%	0.0
Elder Titan	2	4.35%	33.33	22.58	2	50.00%	0.7	0	0.00%	0.0
Windranger	2	4.35%	33.33	22.58	2	50.00%	0.7	0	0.00%	0.0
Outworld Destroyer	1	2.17%	30.11	10.75	0	0.00%	0.0	1	100.00%	0.2
Magnus	7	15.22%	29.03	67.74	0	0.00%	0.0	7	28.57%	1.2
Kunkka	4	8.70%	27.96	48.39	2	0.00%	0.7	2	100.00%	0.3
Anti-Mage	3	6.52%	26.88	47.31	3	33.33%	1.0	0	0.00%	0.0
Tusk	3	6.52%	26.88	47.31	3	33.33%	1.0	0	0.00%	0.0
Bounty Hunter	3	6.52%	26.88	47.31	3	33.33%	1.0	0	0.00%	0.0
Arc Warden	8	17.39%	23.66	82.80	1	100.00%	0.3	7	0.00%	1.2
Bane	4	8.70%	22.58	66.67	4	25.00%	1.3	0	0.00%	0.0
Omniknight	2	4.35%	21.51	15.05	0	0.00%	0.0	2	50.00%	0.3
Weaver	8	17.39%	20.43	94.62	5	20.00%	1.7	3	0.00%	0.5
Gyrocopter	2	4.35%	19.35	24.73	1	0.00%	0.3	1	100.00%	0.2
Lone Druid	3	6.52%	18.28	44.09	1	0.00%	0.3	2	50.00%	0.3
Death Prophet	4	8.70%	17.20	68.82	2	0.00%	0.7	2	50.00%	0.3
Pugna	1	2.17%	16.13	35.48	1	0.00%	0.3	0	0.00%	0.0
Enchantress	1	2.17%	16.13	35.48	1	0.00%	0.3	0	0.00%	0.0
Axe	1	2.17%	16.13	35.48	1	0.00%	0.3	0	0.00%	0.0
Viper	1	2.17%	16.13	35.48	1	0.00%	0.3	0	0.00%	0.0
Naga Siren	1	2.17%	16.13	35.48	1	0.00%	0.3	0	0.00%	0.0
Phoenix	1	2.17%	16.13	35.48	1	0.00%	0.3	0	0.00%	0.0
Ember Spirit	4	8.70%	9.68	90.32	2	0.00%	0.7	2	0.00%	0.3
Zeus	4	8.70%	8.60	93.55	3	0.00%	1.0	1	0.00%	0.2
Lifestealer	2	4.35%	7.53	55.91	1	0.00%	0.3	1	0.00%	0.2
Phantom Lancer	1	2.17%	6.45	35.48	1	0.00%	0.3	0	0.00%	0.0
Pudge	1	2.17%	6.45	35.48	1	0.00%	0.3	0	0.00%	0.0
Oracle	3	6.52%	4.30	79.57	2	0.00%	0.7	1	0.00%	0.2
Necrophos	2	4.35%	3.23	55.91	1	0.00%	0.3	1	0.00%	0.2
Silencer	2	4.35%	2.15	65.59	2	0.00%	0.7	0	0.00%	0.0
Lion	3	6.52%	1.08	82.80	3	0.00%	1.0	0	0.00%	0.0