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): 4 - Median hero bans (mb): 4 - Matches: 43

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

Balance rank	Winrate	Pickrate	Contest Rate
59.6	76.5	43.6	41.0

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Ancient Apparition	31	72.09%	100.00	49.46	6	50.00%	1.5	25	84.00%	6.3
Outworld Destroyer	35	81.40%	98.92	58.06	5	80.00%	1.3	30	63.33%	7.5
Sven	26	60.47%	97.85	53.76	8	75.00%	2.0	18	61.11%	4.5
Rubick	16	37.21%	96.77	39.78	7	85.71%	1.8	9	55.56%	2.3
Ember Spirit	42	97.67%	95.70	88.17	18	72.22%	4.5	24	29.17%	6.0
Batrider	27	62.79%	94.62	63.44	2	100.00%	0.5	25	56.00%	6.3
Morphling	30	69.77%	93.55	75.27	8	37.50%	2.0	22	72.73%	5.5
Chen	43	100.00%	92.47	93.55	9	88.89%	2.3	34	32.35%	8.5
Death Prophet	26	60.47%	91.40	74.19	14	57.14%	3.5	12	58.33%	3.0
Beastmaster	18	41.86%	90.32	56.99	12	75.00%	3.0	6	0.00%	1.5
Juggernaut	22	51.16%	89.25	73.12	16	50.00%	4.0	6	83.33%	1.5
Mars	6	13.95%	88.17	13.98	5	80.00%	1.3	1	100.00%	0.3
Slark	13	30.23%	87.10	46.24	7	57.14%	1.8	6	83.33%	1.5
Grimstroke	22	51.16%	86.02	76.34	10	40.00%	2.5	12	75.00%	3.0
Timbersaw	20	46.51%	84.95	72.04	11	54.55%	2.8	9	55.56%	2.3
Shadow Demon	36	83.72%	83.87	94.62	19	47.37%	4.8	17	41.18%	4.3
Vengeful Spirit	3	6.98%	82.80	9.68	3	100.00%	0.8	0	0.00%	0.0
Warlock	13	30.23%	81.72	51.61	7	57.14%	1.8	6	66.67%	1.5
Axe	18	41.86%	80.65	68.82	8	62.50%	2.0	10	40.00%	2.5
Centaur Warrunner	25	58.14%	79.57	89.25	14	42.86%	3.5	11	54.55%	2.8
Storm Spirit	9	20.93%	78.49	32.26	3	33.33%	0.8	6	100.00%	1.5
Omniknight	41	95.35%	77.42	100.00	7	85.71%	1.8	34	20.59%	8.5
Dark Willow	5	11.63%	76.34	16.13	4	75.00%	1.0	1	100.00%	0.3
Wraith King	13	30.23%	75.27	55.91	7	57.14%	1.8	6	50.00%	1.5
Naga Siren	19	44.19%	74.19	78.49	4	25.00%	1.0	15	60.00%	3.8
Phantom Lancer	3	6.98%	73.12	10.75	1	100.00%	0.3	2	100.00%	0.5
Dark Seer	19	44.19%	72.04	83.87	7	42.86%	1.8	12	50.00%	3.0
Earth Spirit	8	18.60%	70.97	45.16	7	57.14%	1.8	1	100.00%	0.3
Spirit Breaker	31	72.09%	69.89	95.70	19	31.58%	4.8	12	58.33%	3.0
Shadow Shaman	11	25.58%	68.82	61.29	9	44.44%	2.3	2	100.00%	0.5
Medusa	12	27.91%	67.74	62.37	6	50.00%	1.5	6	50.00%	1.5
Troll Warlord	13	30.23%	66.67	70.97	6	50.00%	1.5	7	42.86%	1.8
Phoenix	5	11.63%	65.59	23.66	4	75.00%	1.0	1	0.00%	0.3
Enchantress	9	20.93%	64.52	50.54	4	25.00%	1.0	5	100.00%	1.3
Undying	4	9.30%	63.44	17.20	3	66.67%	0.8	1	100.00%	0.3
Leshrac	13	30.23%	62.37	79.57	8	50.00%	2.0	5	20.00%	1.3
Jakiro	5	11.63%	61.29	31.18	5	60.00%	1.3	0	0.00%	0.0
Gyrocopter	5	11.63%	61.29	31.18	5	60.00%	1.3	0	0.00%	0.0
Enigma	15	34.88%	59.14	86.02	8	37.50%	2.0	7	42.86%	1.8
Legion Commander	5	11.63%	58.06	24.73	3	66.67%	0.8	2	50.00%	0.5
Night Stalker	2	4.65%	56.99	1.08	1	100.00%	0.3	1	100.00%	0.3
Dazzle	8	18.60%	55.91	54.84	5	40.00%	1.3	3	66.67%	0.8
Oracle	10	23.26%	54.84	66.67	4	25.00%	1.0	6	66.67%	1.5
Crystal Maiden	5	11.63%	53.76	40.86	4	50.00%	1.0	1	100.00%	0.3
Queen of Pain	12	27.91%	52.69	82.80	6	33.33%	1.5	6	50.00%	1.5
Io	21	48.84%	51.61	97.85	5	60.00%	1.3	16	12.50%	4.0
Alchemist	3	6.98%	50.54	18.28	3	66.67%	0.8	0	0.00%	0.0
Lifestealer	14	32.56%	49.46	90.32	6	33.33%	1.5	8	37.50%	2.0
Treant Protector	3	6.98%	48.39	11.83	1	100.00%	0.3	2	50.00%	0.5
Pugna	6	13.95%	47.31	44.09	2	50.00%	0.5	4	50.00%	1.0
Magnus	14	32.56%	46.24	92.47	5	40.00%	1.3	9	22.22%	2.3
Anti-Mage	7	16.28%	45.16	52.69	2	50.00%	0.5	5	40.00%	1.3
Kunkka	10	23.26%	44.09	81.72	4	50.00%	1.0	6	16.67%	1.5
Terrorblade	3	6.98%	43.01	19.35	2	50.00%	0.5	1	100.00%	0.3
Bane	1	2.33%	41.94	5.38	1	100.00%	0.3	0	0.00%	0.0
Phantom Assassin	1	2.33%	41.94	5.38	1	100.00%	0.3	0	0.00%	0.0
Riki	1	2.33%	41.94	5.38	1	100.00%	0.3	0	0.00%	0.0
Huskar	1	2.33%	41.94	5.38	1	100.00%	0.3	0	0.00%	0.0
Slardar	4	9.30%	37.63	33.33	2	50.00%	0.5	2	50.00%	0.5
Bristleback	6	13.95%	36.56	64.52	5	40.00%	1.3	1	0.00%	0.3
Lion	2	4.65%	35.48	12.90	1	100.00%	0.3	1	0.00%	0.3
Puck	7	16.28%	34.41	65.59	2	50.00%	0.5	5	20.00%	1.3
Sand King	8	18.60%	33.33	87.10	7	28.57%	1.8	1	0.00%	0.3
Windranger	2	4.65%	32.26	22.58	2	50.00%	0.5	0	0.00%	0.0
Nyx Assassin	7	16.28%	31.18	84.95	5	20.00%	1.3	2	50.00%	0.5
Lone Druid	1	2.33%	30.11	8.60	0	0.00%	0.0	1	100.00%	0.3
Clockwerk	1	2.33%	30.11	8.60	0	0.00%	0.0	1	100.00%	0.3
Arc Warden	1	2.33%	30.11	8.60	0	0.00%	0.0	1	100.00%	0.3
Faceless Void	3	6.98%	26.88	41.94	2	50.00%	0.5	1	0.00%	0.3
Lich	3	6.98%	25.81	48.39	3	33.33%	0.8	0	0.00%	0.0
Lina	11	25.58%	24.73	98.92	8	12.50%	2.0	3	33.33%	0.8
Earthshaker	5	11.63%	23.66	69.89	3	33.33%	0.8	2	0.00%	0.5
Weaver	2	4.65%	22.58	15.05	0	0.00%	0.0	2	50.00%	0.5
Ursa	2	4.65%	21.51	29.03	1	0.00%	0.3	1	100.00%	0.3
Shadow Fiend	2	4.65%	21.51	29.03	1	0.00%	0.3	1	100.00%	0.3
Razor	2	4.65%	21.51	29.03	1	0.00%	0.3	1	100.00%	0.3
Tiny	2	4.65%	21.51	29.03	1	0.00%	0.3	1	100.00%	0.3
Monkey King	3	6.98%	17.20	47.31	1	0.00%	0.3	2	50.00%	0.5
Necrophos	4	9.30%	16.13	67.74	2	0.00%	0.5	2	50.00%	0.5
Silencer	4	9.30%	15.05	77.42	3	0.00%	0.8	1	100.00%	0.3
Pangolier	5	11.63%	13.98	96.77	4	0.00%	1.0	1	0.00%	0.3
Clinkz	2	4.65%	12.90	60.22	2	0.00%	0.5	0	0.00%	0.0
Sniper	1	2.33%	11.83	38.71	1	0.00%	0.3	0	0.00%	0.0
Winter Wyvern	2	4.65%	10.75	43.01	0	0.00%	0.0	2	0.00%	0.5
Tidehunter	1	2.33%	9.68	38.71	1	0.00%	0.3	0	0.00%	0.0
Bounty Hunter	1	2.33%	9.68	38.71	1	0.00%	0.3	0	0.00%	0.0
Dragon Knight	1	2.33%	9.68	38.71	1	0.00%	0.3	0	0.00%	0.0
Elder Titan	1	2.33%	9.68	38.71	1	0.00%	0.3	0	0.00%	0.0
Nature's Prophet	1	2.33%	5.38	21.51	0	0.00%	0.0	1	0.00%	0.3
Invoker	1	2.33%	5.38	21.51	0	0.00%	0.0	1	0.00%	0.3
Witch Doctor	2	4.65%	3.23	60.22	2	0.00%	0.5	0	0.00%	0.0
Doom	4	9.30%	2.15	91.40	2	0.00%	0.5	2	0.00%	0.5
Spectre	3	6.98%	1.08	81.72	2	0.00%	0.5	1	0.00%	0.3