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): 5 - Matches: 43

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

Balance rank	Winrate	Pickrate	Contest Rate
56.7	74.3	41.7	34.2

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Riki	10	23.26%	100.00	5.32	3	100.00%	0.8	7	85.71%	1.4
Broodmother	32	74.42%	98.94	56.38	4	75.00%	1.0	28	64.29%	5.6
Templar Assassin	33	76.74%	97.87	61.70	16	68.75%	4.0	17	58.82%	3.4
Medusa	18	41.86%	96.81	41.49	8	75.00%	2.0	10	70.00%	2.0
Dark Seer	33	76.74%	95.74	73.40	15	60.00%	3.8	18	61.11%	3.6
Terrorblade	20	46.51%	94.68	45.74	6	66.67%	1.5	14	71.43%	2.8
Tidehunter	22	51.16%	93.62	50.00	3	100.00%	0.8	19	57.89%	3.8
Lina	19	44.19%	92.55	46.81	3	100.00%	0.8	16	56.25%	3.2
Timbersaw	35	81.40%	91.49	82.98	7	57.14%	1.8	28	53.57%	5.6
Night Stalker	8	18.60%	90.43	15.96	7	85.71%	1.8	1	0.00%	0.2
Dragon Knight	19	44.19%	89.36	55.32	9	44.44%	2.3	10	90.00%	2.0
Nyx Assassin	34	79.07%	88.30	88.30	15	53.33%	3.8	19	47.37%	3.8
Shadow Demon	12	27.91%	87.23	39.36	7	71.43%	1.8	5	60.00%	1.0
Spectre	24	55.81%	86.17	72.34	8	75.00%	2.0	16	37.50%	3.2
Storm Spirit	14	32.56%	85.11	42.55	4	100.00%	1.0	10	40.00%	2.0
Winter Wyvern	21	48.84%	84.04	67.02	13	53.85%	3.3	8	62.50%	1.6
Ember Spirit	20	46.51%	82.98	63.83	5	40.00%	1.3	15	66.67%	3.0
Doom	12	27.91%	81.91	40.43	3	66.67%	0.8	9	66.67%	1.8
Faceless Void	15	34.88%	80.85	53.19	7	71.43%	1.8	8	37.50%	1.6
Viper	31	72.09%	79.79	90.43	9	33.33%	2.3	22	54.55%	4.4
Ancient Apparition	22	51.16%	78.72	78.72	10	50.00%	2.5	12	50.00%	2.4
Clockwerk	8	18.60%	77.66	31.91	5	80.00%	1.3	3	33.33%	0.6
Grimstroke	20	46.51%	76.60	84.04	16	50.00%	4.0	4	25.00%	0.8
Abaddon	31	72.09%	75.53	95.74	15	53.33%	3.8	16	18.75%	3.2
Pangolier	16	37.21%	74.47	71.28	10	40.00%	2.5	6	83.33%	1.2
Mirana	15	34.88%	73.40	70.21	11	45.45%	2.8	4	75.00%	0.8
Phantom Lancer	8	18.60%	72.34	29.79	1	0.00%	0.3	7	85.71%	1.4
Puck	29	67.44%	71.28	94.68	9	33.33%	2.3	20	45.00%	4.0
Chen	5	11.63%	70.21	8.51	0	0.00%	0.0	5	80.00%	1.0
Luna	19	44.19%	69.15	89.36	10	40.00%	2.5	9	44.44%	1.8
Invoker	12	27.91%	68.09	57.45	4	50.00%	1.0	8	50.00%	1.6
Tusk	5	11.63%	67.02	14.89	2	100.00%	0.5	3	33.33%	0.6
Phoenix	12	27.91%	65.96	64.89	7	57.14%	1.8	5	20.00%	1.0
Beastmaster	7	16.28%	64.89	32.98	1	100.00%	0.3	6	50.00%	1.2
Oracle	6	13.95%	63.83	35.11	4	75.00%	1.0	2	0.00%	0.4
Windranger	7	16.28%	62.77	47.87	6	50.00%	1.5	1	100.00%	0.2
Juggernaut	6	13.95%	61.70	30.85	2	50.00%	0.5	4	75.00%	0.8
Bloodseeker	8	18.60%	60.64	44.68	3	66.67%	0.8	5	40.00%	1.0
Void Spirit	10	23.26%	59.57	62.77	7	42.86%	1.8	3	66.67%	0.6
Razor	6	13.95%	58.51	21.28	0	0.00%	0.0	6	66.67%	1.2
Queen of Pain	3	6.98%	57.45	7.45	2	100.00%	0.5	1	0.00%	0.2
Centaur Warrunner	3	6.98%	57.45	7.45	2	100.00%	0.5	1	0.00%	0.2
Kunkka	20	46.51%	55.32	92.55	8	37.50%	2.0	12	33.33%	2.4
Lifestealer	15	34.88%	54.26	79.79	2	0.00%	0.5	13	53.85%	2.6
Wraith King	10	23.26%	53.19	60.64	5	40.00%	1.3	5	60.00%	1.0
Earth Spirit	5	11.63%	52.13	27.66	3	66.67%	0.8	2	50.00%	0.4
Lion	19	44.19%	51.06	93.62	12	41.67%	3.0	7	14.29%	1.4
Brewmaster	11	25.58%	50.00	68.09	5	40.00%	1.3	6	50.00%	1.2
Mars	21	48.84%	48.94	96.81	6	33.33%	1.5	15	33.33%	3.0
Batrider	15	34.88%	47.87	87.23	4	50.00%	1.0	11	27.27%	2.2
Magnus	12	27.91%	46.81	80.85	6	50.00%	1.5	6	16.67%	1.2
Hoodwink	11	25.58%	45.74	81.91	10	40.00%	2.5	1	0.00%	0.2
Sand King	18	41.86%	44.68	97.87	11	27.27%	2.8	7	42.86%	1.4
Ogre Magi	3	6.98%	43.62	13.83	3	66.67%	0.8	0	0.00%	0.0
Shadow Shaman	3	6.98%	43.62	13.83	3	66.67%	0.8	0	0.00%	0.0
Gyrocopter	14	32.56%	41.49	91.49	9	33.33%	2.3	5	20.00%	1.0
Ursa	11	25.58%	40.43	76.60	3	33.33%	0.8	8	37.50%	1.6
Lich	4	9.30%	39.36	38.30	4	50.00%	1.0	0	0.00%	0.0
Leshrac	11	25.58%	38.30	86.17	4	25.00%	1.0	7	42.86%	1.4
Outworld Destroyer	1	2.33%	37.23	1.06	1	100.00%	0.3	0	0.00%	0.0
Morphling	6	13.95%	36.17	54.26	4	50.00%	1.0	2	0.00%	0.4
Spirit Breaker	4	9.30%	35.11	34.04	2	50.00%	0.5	2	50.00%	0.4
Omniknight	2	4.65%	34.04	9.57	1	100.00%	0.3	1	0.00%	0.2
Slardar	3	6.98%	32.98	26.60	1	100.00%	0.3	2	0.00%	0.4
Axe	7	16.28%	31.91	75.53	4	0.00%	1.0	3	100.00%	0.6
Sniper	2	4.65%	30.85	25.53	2	50.00%	0.5	0	0.00%	0.0
Undying	2	4.65%	30.85	25.53	2	50.00%	0.5	0	0.00%	0.0
Anti-Mage	2	4.65%	30.85	25.53	2	50.00%	0.5	0	0.00%	0.0
Clinkz	2	4.65%	30.85	25.53	2	50.00%	0.5	0	0.00%	0.0
Nature's Prophet	7	16.28%	26.60	85.11	5	20.00%	1.3	2	50.00%	0.4
Bristleback	1	2.33%	25.53	4.26	0	0.00%	0.0	1	100.00%	0.2
Slark	1	2.33%	25.53	4.26	0	0.00%	0.0	1	100.00%	0.2
Shadow Fiend	1	2.33%	25.53	4.26	0	0.00%	0.0	1	100.00%	0.2
Enchantress	5	11.63%	22.34	65.96	3	33.33%	0.8	2	0.00%	0.4
Legion Commander	2	4.65%	21.28	11.70	0	0.00%	0.0	2	50.00%	0.4
Huskar	2	4.65%	21.28	11.70	0	0.00%	0.0	2	50.00%	0.4
Arc Warden	2	4.65%	19.15	28.72	1	0.00%	0.3	1	100.00%	0.2
Death Prophet	4	9.30%	18.09	48.94	0	0.00%	0.0	4	25.00%	0.8
Venomancer	3	6.98%	17.02	43.62	1	0.00%	0.3	2	50.00%	0.4
Drow Ranger	5	11.63%	15.96	77.66	2	0.00%	0.5	3	33.33%	0.6
Monkey King	7	16.28%	14.89	98.94	4	0.00%	1.0	3	33.33%	0.6
Tiny	2	4.65%	13.83	52.13	1	0.00%	0.3	1	0.00%	0.2
Pudge	2	4.65%	12.77	59.57	2	0.00%	0.5	0	0.00%	0.0
Disruptor	2	4.65%	11.70	52.13	1	0.00%	0.3	1	0.00%	0.2
Snapfire	2	4.65%	10.64	59.57	2	0.00%	0.5	0	0.00%	0.0
Zeus	3	6.98%	9.57	69.15	1	0.00%	0.3	2	0.00%	0.4
Keeper of the Light	1	2.33%	8.51	37.23	1	0.00%	0.3	0	0.00%	0.0
Tinker	1	2.33%	8.51	37.23	1	0.00%	0.3	0	0.00%	0.0
Meepo	1	2.33%	6.38	20.21	0	0.00%	0.0	1	0.00%	0.2
Treant Protector	1	2.33%	6.38	20.21	0	0.00%	0.0	1	0.00%	0.2
Rubick	6	13.95%	4.26	100.00	5	0.00%	1.3	1	0.00%	0.2
Skywrath Mage	1	2.33%	3.19	20.21	0	0.00%	0.0	1	0.00%	0.2
Sven	1	2.33%	3.19	20.21	0	0.00%	0.0	1	0.00%	0.2
Elder Titan	3	6.98%	1.06	75.53	2	0.00%	0.5	1	0.00%	0.2