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: 47

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

Balance rank	Winrate	Pickrate	Contest Rate
56.0	75.0	37.6	35.9

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Lifestealer	16	34.04%	100.00	9.68	4	100.00%	1.3	12	91.67%	2.0
Tiny	17	36.17%	98.92	18.28	9	88.89%	3.0	8	62.50%	1.3
Ember Spirit	44	93.62%	97.85	80.65	15	66.67%	5.0	29	55.17%	4.8
Morphling	37	78.72%	96.77	76.34	10	70.00%	3.3	27	51.85%	4.5
Warlock	33	70.21%	95.70	73.12	5	60.00%	1.7	28	60.71%	4.7
Ancient Apparition	29	61.70%	94.62	66.67	18	66.67%	6.0	11	45.45%	1.8
Tidehunter	24	51.06%	93.55	62.37	15	66.67%	5.0	9	55.56%	1.5
Kunkka	24	51.06%	92.47	64.52	7	57.14%	2.3	17	64.71%	2.8
Oracle	18	38.30%	91.40	58.06	8	62.50%	2.7	10	70.00%	1.7
Anti-Mage	16	34.04%	90.32	49.46	6	83.33%	2.0	10	50.00%	1.7
Spirit Breaker	45	95.74%	89.25	91.40	10	40.00%	3.3	35	54.29%	5.8
Sand King	7	14.89%	88.17	10.75	5	80.00%	1.7	2	100.00%	0.3
Wraith King	33	70.21%	87.10	84.95	17	47.06%	5.7	16	62.50%	2.7
Grimstroke	34	72.34%	86.02	87.10	20	50.00%	6.7	14	50.00%	2.3
Axe	13	27.66%	84.95	47.31	5	80.00%	1.7	8	50.00%	1.3
Shadow Shaman	18	38.30%	83.87	65.59	16	56.25%	5.3	2	50.00%	0.3
Doom	10	21.28%	82.80	22.58	3	66.67%	1.0	7	71.43%	1.2
Rubick	30	63.83%	81.72	89.25	15	46.67%	5.0	15	46.67%	2.5
Storm Spirit	16	34.04%	80.65	63.44	7	42.86%	2.3	9	77.78%	1.5
Omniknight	39	82.98%	79.57	98.92	18	38.89%	6.0	21	47.62%	3.5
Razor	12	25.53%	78.49	54.84	6	66.67%	2.0	6	50.00%	1.0
Pugna	6	12.77%	77.42	11.83	3	100.00%	1.0	3	33.33%	0.5
Io	33	70.21%	76.34	94.62	2	50.00%	0.7	31	41.94%	5.2
Lina	19	40.43%	75.27	77.42	11	54.55%	3.7	8	37.50%	1.3
Leshrac	26	55.32%	74.19	88.17	19	36.84%	6.3	7	85.71%	1.2
Troll Warlord	16	34.04%	73.12	68.82	9	44.44%	3.0	7	71.43%	1.2
Shadow Demon	15	31.91%	72.04	67.74	10	60.00%	3.3	5	20.00%	0.8
Centaur Warrunner	28	59.57%	70.97	92.47	17	47.06%	5.7	11	27.27%	1.8
Earthshaker	10	21.28%	69.89	55.91	7	71.43%	2.3	3	0.00%	0.5
Juggernaut	8	17.02%	68.82	24.73	3	66.67%	1.0	5	60.00%	0.8
Sven	18	38.30%	67.74	83.87	12	41.67%	4.0	6	50.00%	1.0
Undying	8	17.02%	66.67	51.61	6	66.67%	2.0	2	0.00%	0.3
Skywrath Mage	2	4.26%	65.59	5.38	2	100.00%	0.7	0	0.00%	0.0
Chaos Knight	2	4.26%	65.59	5.38	2	100.00%	0.7	0	0.00%	0.0
Dark Seer	21	44.68%	63.44	90.32	7	42.86%	2.3	14	35.71%	2.3
Outworld Destroyer	34	72.34%	62.37	100.00	10	30.00%	3.3	24	33.33%	4.0
Nyx Assassin	17	36.17%	61.29	86.02	5	60.00%	1.7	12	25.00%	2.0
Batrider	10	21.28%	60.22	60.22	2	100.00%	0.7	8	25.00%	1.3
Windranger	5	10.64%	59.14	19.35	3	66.67%	1.0	2	50.00%	0.3
Invoker	2	4.26%	58.06	7.53	1	100.00%	0.3	1	100.00%	0.2
Naga Siren	7	14.89%	56.99	45.16	2	0.00%	0.7	5	100.00%	0.8
Broodmother	11	23.40%	55.91	69.89	3	66.67%	1.0	8	25.00%	1.3
Enigma	19	40.43%	54.84	93.55	5	20.00%	1.7	14	42.86%	2.3
Medusa	19	40.43%	53.76	95.70	5	40.00%	1.7	14	28.57%	2.3
Death Prophet	19	40.43%	52.69	97.85	12	41.67%	4.0	7	0.00%	1.2
Bane	8	17.02%	51.61	61.29	5	40.00%	1.7	3	66.67%	0.5
Mars	5	10.64%	50.54	41.94	4	50.00%	1.3	1	100.00%	0.2
Arc Warden	19	40.43%	49.46	96.77	6	33.33%	2.0	13	30.77%	2.2
Bristleback	10	21.28%	48.39	74.19	3	0.00%	1.0	7	71.43%	1.2
Slark	9	19.15%	47.31	75.27	7	28.57%	2.3	2	100.00%	0.3
Earth Spirit	5	10.64%	46.24	46.24	3	33.33%	1.0	2	100.00%	0.3
Clinkz	3	6.38%	45.16	13.98	2	50.00%	0.7	1	100.00%	0.2
Tusk	3	6.38%	45.16	13.98	2	50.00%	0.7	1	100.00%	0.2
Magnus	5	10.64%	43.01	40.86	1	100.00%	0.3	4	25.00%	0.7
Phantom Assassin	1	2.13%	41.94	8.60	1	100.00%	0.3	0	0.00%	0.0
Terrorblade	1	2.13%	41.94	6.45	1	100.00%	0.3	0	0.00%	0.0
Sniper	1	2.13%	41.94	3.23	1	100.00%	0.3	0	0.00%	0.0
Riki	1	2.13%	41.94	3.23	1	100.00%	0.3	0	0.00%	0.0
Witch Doctor	9	19.15%	37.63	82.80	7	28.57%	2.3	2	50.00%	0.3
Queen of Pain	4	8.51%	36.56	23.66	2	50.00%	0.7	2	50.00%	0.3
Disruptor	6	12.77%	35.48	72.04	6	33.33%	2.0	0	0.00%	0.0
Monkey King	3	6.38%	34.41	17.20	1	0.00%	0.3	2	100.00%	0.3
Night Stalker	4	8.51%	33.33	44.09	1	0.00%	0.3	3	66.67%	0.5
Winter Wyvern	2	4.26%	32.26	16.13	2	50.00%	0.7	0	0.00%	0.0
Chen	1	2.13%	31.18	1.08	0	0.00%	0.0	1	100.00%	0.2
Venomancer	3	6.38%	30.11	43.01	2	50.00%	0.7	1	0.00%	0.2
Templar Assassin	4	8.51%	29.03	56.99	2	50.00%	0.7	2	0.00%	0.3
Lion	3	6.38%	27.96	53.76	3	33.33%	1.0	0	0.00%	0.0
Gyrocopter	3	6.38%	27.96	53.76	3	33.33%	1.0	0	0.00%	0.0
Legion Commander	2	4.26%	25.81	21.51	1	0.00%	0.3	1	100.00%	0.2
Beastmaster	2	4.26%	25.81	21.51	1	0.00%	0.3	1	100.00%	0.2
Lone Druid	3	6.38%	23.66	50.54	1	0.00%	0.3	2	50.00%	0.3
Ursa	3	6.38%	22.58	59.14	2	0.00%	0.7	1	100.00%	0.2
Timbersaw	3	6.38%	21.51	70.97	1	0.00%	0.3	2	0.00%	0.3
Meepo	1	2.13%	20.43	39.78	1	0.00%	0.3	0	0.00%	0.0
Silencer	1	2.13%	20.43	39.78	1	0.00%	0.3	0	0.00%	0.0
Jakiro	1	2.13%	20.43	39.78	1	0.00%	0.3	0	0.00%	0.0
Bounty Hunter	1	2.13%	20.43	39.78	1	0.00%	0.3	0	0.00%	0.0
Clockwerk	1	2.13%	20.43	39.78	1	0.00%	0.3	0	0.00%	0.0
Dazzle	1	2.13%	20.43	39.78	1	0.00%	0.3	0	0.00%	0.0
Dragon Knight	1	2.13%	20.43	39.78	1	0.00%	0.3	0	0.00%	0.0
Luna	1	2.13%	20.43	39.78	1	0.00%	0.3	0	0.00%	0.0
Pangolier	3	6.38%	11.83	79.57	2	0.00%	0.7	1	0.00%	0.2
Puck	3	6.38%	11.83	79.57	2	0.00%	0.7	1	0.00%	0.2
Keeper of the Light	1	2.13%	9.68	39.78	1	0.00%	0.3	0	0.00%	0.0
Necrophos	1	2.13%	9.68	39.78	1	0.00%	0.3	0	0.00%	0.0
Alchemist	2	4.26%	7.53	48.39	0	0.00%	0.0	2	0.00%	0.3
Dark Willow	1	2.13%	6.45	39.78	1	0.00%	0.3	0	0.00%	0.0
Shadow Fiend	1	2.13%	6.45	39.78	1	0.00%	0.3	0	0.00%	0.0
Crystal Maiden	1	2.13%	6.45	39.78	1	0.00%	0.3	0	0.00%	0.0
Viper	1	2.13%	3.23	15.05	0	0.00%	0.0	1	0.00%	0.2
Brewmaster	3	6.38%	2.15	81.72	3	0.00%	1.0	0	0.00%	0.0
Weaver	1	2.13%	1.08	39.78	1	0.00%	0.3	0	0.00%	0.0