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: 64

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

Balance rank	Winrate	Pickrate	Contest Rate
56.7	81.0	34.2	28.8

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Drow Ranger	38	59.38%	100.00	59.04	9	100.00%	1.8	29	41.38%	4.1
Mirana	13	20.31%	98.80	20.48	13	76.92%	2.6	0	0.00%	0.0
Faceless Void	48	75.00%	97.59	77.11	27	66.67%	5.4	21	33.33%	3.0
Lifestealer	56	87.50%	96.39	84.34	18	50.00%	3.6	38	57.89%	5.4
Terrorblade	48	75.00%	95.18	81.93	14	71.43%	2.8	34	41.18%	4.9
Dragon Knight	25	39.06%	93.98	54.22	15	66.67%	3.0	10	50.00%	1.4
Dark Seer	46	71.88%	92.77	85.54	19	36.84%	3.8	27	70.37%	3.9
Nyx Assassin	6	9.38%	91.57	10.84	4	100.00%	0.8	2	50.00%	0.3
Ancient Apparition	10	15.63%	90.36	15.66	4	100.00%	0.8	6	50.00%	0.9
Tidehunter	25	39.06%	89.16	62.65	13	46.15%	2.6	12	83.33%	1.7
Death Prophet	58	90.63%	87.95	92.77	20	40.00%	4.0	38	52.63%	5.4
Timbersaw	23	35.94%	86.75	60.24	15	60.00%	3.0	8	50.00%	1.1
Kunkka	22	34.38%	85.54	55.42	12	66.67%	2.4	10	40.00%	1.4
Naga Siren	32	50.00%	84.34	71.08	5	80.00%	1.0	27	44.44%	3.9
Batrider	33	51.56%	83.13	75.90	15	53.33%	3.0	18	50.00%	2.6
Axe	16	25.00%	81.93	46.99	8	62.50%	1.6	8	62.50%	1.1
Vengeful Spirit	30	46.88%	80.72	78.31	21	52.38%	4.2	9	44.44%	1.3
Invoker	28	43.75%	79.52	72.29	12	58.33%	2.4	16	43.75%	2.3
Beastmaster	33	51.56%	78.31	79.52	11	45.45%	2.2	22	54.55%	3.1
Crystal Maiden	13	20.31%	77.11	45.78	9	66.67%	1.8	4	50.00%	0.6
Tinker	23	35.94%	75.90	63.86	6	33.33%	1.2	17	70.59%	2.4
Clinkz	11	17.19%	74.70	25.30	5	80.00%	1.0	6	50.00%	0.9
Disruptor	52	81.25%	73.49	96.39	46	41.30%	9.2	6	66.67%	0.9
Riki	51	79.69%	72.29	93.98	14	28.57%	2.8	37	54.05%	5.3
Oracle	16	25.00%	71.08	53.01	8	62.50%	1.6	8	50.00%	1.1
Enigma	3	4.69%	69.88	6.02	3	100.00%	0.6	0	0.00%	0.0
Slardar	23	35.94%	68.67	73.49	15	46.67%	3.0	8	62.50%	1.1
Earth Spirit	50	78.13%	67.47	100.00	26	34.62%	5.2	24	50.00%	3.4
Sven	20	31.25%	66.27	66.27	9	55.56%	1.8	11	45.45%	1.6
Phoenix	20	31.25%	65.06	69.88	12	50.00%	2.4	8	50.00%	1.1
Medusa	9	14.06%	63.86	37.35	5	60.00%	1.0	4	75.00%	0.6
Bounty Hunter	25	39.06%	62.65	80.72	8	37.50%	1.6	17	52.94%	2.4
Night Stalker	8	12.50%	61.45	21.69	4	75.00%	0.8	4	50.00%	0.6
Elder Titan	28	43.75%	60.24	89.16	20	50.00%	4.0	8	0.00%	1.1
Slark	25	39.06%	59.04	86.75	15	26.67%	3.0	10	90.00%	1.4
Puck	9	14.06%	57.83	26.51	2	100.00%	0.4	7	42.86%	1.0
Storm Spirit	27	42.19%	56.63	90.36	14	35.71%	2.8	13	46.15%	1.9
Dazzle	13	20.31%	55.42	56.63	7	57.14%	1.4	6	33.33%	0.9
Gyrocopter	8	12.50%	54.22	40.96	6	50.00%	1.2	2	100.00%	0.3
Bane	2	3.13%	53.01	8.43	2	100.00%	0.4	0	0.00%	0.0
Juggernaut	32	50.00%	51.81	98.80	17	29.41%	3.4	15	46.67%	2.1
Io	9	14.06%	50.60	48.19	6	66.67%	1.2	3	0.00%	0.4
Broodmother	9	14.06%	49.40	44.58	2	50.00%	0.4	7	57.14%	1.0
Templar Assassin	6	9.38%	48.19	24.10	4	75.00%	0.8	2	0.00%	0.3
Viper	8	12.50%	46.99	39.76	3	66.67%	0.6	5	40.00%	0.7
Shadow Demon	3	4.69%	45.78	12.05	2	100.00%	0.4	1	0.00%	0.1
Lion	17	26.56%	44.58	87.95	13	38.46%	2.6	4	25.00%	0.6
Luna	2	3.13%	43.37	9.64	1	100.00%	0.2	1	100.00%	0.1
Undying	6	9.38%	42.17	38.55	5	60.00%	1.0	1	0.00%	0.1
Doom	10	15.63%	40.96	57.83	6	50.00%	1.2	4	25.00%	0.6
Silencer	4	6.25%	39.76	13.25	2	50.00%	0.4	2	100.00%	0.3
Spectre	8	12.50%	38.55	51.81	5	40.00%	1.0	3	66.67%	0.4
Winter Wyvern	5	7.81%	37.35	33.73	4	50.00%	0.8	1	100.00%	0.1
Omniknight	5	7.81%	37.35	33.73	4	50.00%	0.8	1	100.00%	0.1
Queen of Pain	14	21.88%	34.94	83.13	6	33.33%	1.2	8	37.50%	1.1
Witch Doctor	8	12.50%	33.73	65.06	8	37.50%	1.6	0	0.00%	0.0
Morphling	10	15.63%	32.53	68.67	4	50.00%	0.8	6	16.67%	0.9
Phantom Lancer	3	4.69%	31.33	14.46	2	50.00%	0.4	1	100.00%	0.1
Alchemist	19	29.69%	30.12	97.59	5	0.00%	1.0	14	42.86%	2.0
Visage	1	1.56%	28.92	4.82	1	100.00%	0.2	0	0.00%	0.0
Huskar	1	1.56%	28.92	4.82	1	100.00%	0.2	0	0.00%	0.0
Spirit Breaker	1	1.56%	28.92	4.82	1	100.00%	0.2	0	0.00%	0.0
Rubick	1	1.56%	28.92	7.23	1	100.00%	0.2	0	0.00%	0.0
Treant Protector	1	1.56%	28.92	4.82	1	100.00%	0.2	0	0.00%	0.0
Lycan	17	26.56%	22.89	95.18	7	0.00%	1.4	10	60.00%	1.4
Clockwerk	6	9.38%	21.69	50.60	4	25.00%	0.8	2	100.00%	0.3
Shadow Fiend	4	6.25%	20.48	22.89	2	50.00%	0.4	2	50.00%	0.3
Windranger	3	4.69%	19.28	19.28	1	100.00%	0.2	2	0.00%	0.3
Earthshaker	2	3.13%	18.07	18.07	2	50.00%	0.4	0	0.00%	0.0
Skywrath Mage	2	3.13%	18.07	18.07	2	50.00%	0.4	0	0.00%	0.0
Chen	3	4.69%	15.66	36.14	2	50.00%	0.4	1	0.00%	0.1
Warlock	3	4.69%	15.66	36.14	2	50.00%	0.4	1	0.00%	0.1
Weaver	10	15.63%	13.25	91.57	6	16.67%	1.2	4	25.00%	0.6
Tusk	3	4.69%	12.05	43.37	3	33.33%	0.6	0	0.00%	0.0
Lich	3	4.69%	12.05	43.37	3	33.33%	0.6	0	0.00%	0.0
Enchantress	2	3.13%	9.64	49.40	1	0.00%	0.2	1	0.00%	0.1
Nature's Prophet	1	1.56%	8.43	31.33	1	0.00%	0.2	0	0.00%	0.0
Anti-Mage	3	4.69%	7.23	67.47	2	0.00%	0.4	1	0.00%	0.1
Abaddon	1	1.56%	6.02	31.33	1	0.00%	0.2	0	0.00%	0.0
Keeper of the Light	1	1.56%	6.02	31.33	1	0.00%	0.2	0	0.00%	0.0
Ursa	1	1.56%	6.02	31.33	1	0.00%	0.2	0	0.00%	0.0
Lone Druid	3	4.69%	2.41	61.45	1	0.00%	0.2	2	0.00%	0.3
Bristleback	3	4.69%	1.20	75.90	3	0.00%	0.6	0	0.00%	0.0