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): 4 - Matches: 23

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

Balance rank	Winrate	Pickrate	Contest Rate
42.8	56.9	33.1	19.8

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Abaddon	6	26.09%	100.00	1.39	2	100.00%	0.7	4	100.00%	1.0
Doom	10	43.48%	98.61	18.06	3	100.00%	1.0	7	71.43%	1.8
Visage	8	34.78%	97.22	15.28	2	100.00%	0.7	6	83.33%	1.5
Mirana	13	56.52%	95.83	50.00	9	88.89%	3.0	4	0.00%	1.0
Dragon Knight	17	73.91%	94.44	70.83	7	71.43%	2.3	10	50.00%	2.5
Storm Spirit	16	69.57%	93.06	72.22	7	57.14%	2.3	9	66.67%	2.3
Sand King	19	82.61%	91.67	79.17	12	66.67%	4.0	7	14.29%	1.8
Phoenix	7	30.43%	90.28	36.11	5	80.00%	1.7	2	50.00%	0.5
Pugna	23	100.00%	88.89	87.50	7	57.14%	2.3	16	43.75%	4.0
Bloodseeker	13	56.52%	87.50	61.11	3	100.00%	1.0	10	40.00%	2.5
Ember Spirit	15	65.22%	86.11	77.78	7	42.86%	2.3	8	75.00%	2.0
Spectre	10	43.48%	84.72	56.94	4	100.00%	1.3	6	16.67%	1.5
Puck	19	82.61%	83.33	84.72	8	50.00%	2.7	11	45.45%	2.8
Medusa	21	91.30%	81.94	90.28	3	33.33%	1.0	18	50.00%	4.5
Chaos Knight	23	100.00%	80.56	93.06	9	44.44%	3.0	14	42.86%	3.5
Io	20	86.96%	79.17	88.89	4	25.00%	1.3	16	56.25%	4.0
Beastmaster	11	47.83%	77.78	65.28	3	66.67%	1.0	8	50.00%	2.0
Shadow Shaman	11	47.83%	76.39	69.44	7	57.14%	2.3	4	50.00%	1.0
Skywrath Mage	12	52.17%	75.00	75.00	5	40.00%	1.7	7	71.43%	1.8
Tiny	7	30.43%	73.61	40.28	2	100.00%	0.7	5	40.00%	1.3
Wraith King	12	52.17%	72.22	76.39	2	50.00%	0.7	10	50.00%	2.5
Necrophos	3	13.04%	70.83	6.94	0	0.00%	0.0	3	100.00%	0.8
Keeper of the Light	10	43.48%	69.44	63.89	1	100.00%	0.3	9	44.44%	2.3
Underlord	7	30.43%	68.06	51.39	3	33.33%	1.0	4	100.00%	1.0
Hoodwink	12	52.17%	66.67	80.56	10	40.00%	3.3	2	100.00%	0.5
Mars	22	95.65%	65.28	97.22	12	33.33%	4.0	10	40.00%	2.5
Monkey King	13	56.52%	63.89	81.94	3	33.33%	1.0	10	50.00%	2.5
Death Prophet	5	21.74%	62.50	38.89	3	66.67%	1.0	2	50.00%	0.5
Lycan	5	21.74%	62.50	38.89	3	66.67%	1.0	2	50.00%	0.5
Jakiro	2	8.70%	59.72	8.33	1	100.00%	0.3	1	100.00%	0.3
Lifestealer	5	21.74%	58.33	31.94	1	100.00%	0.3	4	50.00%	1.0
Invoker	7	30.43%	56.94	48.61	0	0.00%	0.0	7	57.14%	1.8
Void Spirit	4	17.39%	55.56	20.83	2	50.00%	0.7	2	100.00%	0.5
Bane	19	82.61%	54.17	98.61	13	38.46%	4.3	6	0.00%	1.5
Terrorblade	3	13.04%	52.78	19.44	3	66.67%	1.0	0	0.00%	0.0
Undying	2	8.70%	51.39	2.78	0	0.00%	0.0	2	100.00%	0.5
Viper	7	30.43%	50.00	66.67	2	0.00%	0.7	5	80.00%	1.3
Weaver	5	21.74%	48.61	55.56	3	66.67%	1.0	2	0.00%	0.5
Enchantress	5	21.74%	48.61	55.56	3	66.67%	1.0	2	0.00%	0.5
Snapfire	10	43.48%	45.83	86.11	8	25.00%	2.7	2	100.00%	0.5
Timbersaw	3	13.04%	44.44	23.61	2	50.00%	0.7	1	100.00%	0.3
Axe	3	13.04%	44.44	23.61	2	50.00%	0.7	1	100.00%	0.3
Grimstroke	12	52.17%	41.67	94.44	6	16.67%	2.0	6	50.00%	1.5
Razor	9	39.13%	40.28	83.33	3	33.33%	1.0	6	33.33%	1.5
Faceless Void	6	26.09%	38.89	62.50	1	0.00%	0.3	5	60.00%	1.3
Techies	1	4.35%	37.50	5.56	1	100.00%	0.3	0	0.00%	0.0
Morphling	1	4.35%	37.50	5.56	1	100.00%	0.3	0	0.00%	0.0
Kunkka	17	73.91%	34.72	100.00	5	20.00%	1.7	12	25.00%	3.0
Slardar	4	17.39%	33.33	41.67	2	50.00%	0.7	2	50.00%	0.5
Ursa	3	13.04%	31.94	16.67	0	0.00%	0.0	3	66.67%	0.8
Pangolier	12	52.17%	30.56	95.83	6	16.67%	2.0	6	33.33%	1.5
Batrider	4	17.39%	29.17	52.78	1	0.00%	0.3	3	66.67%	0.8
Disruptor	2	8.70%	27.78	34.72	2	50.00%	0.7	0	0.00%	0.0
Clockwerk	2	8.70%	27.78	34.72	2	50.00%	0.7	0	0.00%	0.0
Anti-Mage	5	21.74%	25.00	68.06	1	0.00%	0.3	4	50.00%	1.0
Centaur Warrunner	1	4.35%	23.61	13.89	0	0.00%	0.0	1	100.00%	0.3
Drow Ranger	1	4.35%	23.61	13.89	0	0.00%	0.0	1	100.00%	0.3
Huskar	1	4.35%	23.61	13.89	0	0.00%	0.0	1	100.00%	0.3
Phantom Assassin	1	4.35%	23.61	13.89	0	0.00%	0.0	1	100.00%	0.3
Phantom Lancer	3	13.04%	18.06	59.72	3	33.33%	1.0	0	0.00%	0.0
Juggernaut	4	17.39%	16.67	73.61	3	33.33%	1.0	1	0.00%	0.3
Lina	7	30.43%	15.28	91.67	3	0.00%	1.0	4	50.00%	1.0
Crystal Maiden	1	4.35%	13.89	47.22	1	0.00%	0.3	0	0.00%	0.0
Gyrocopter	1	4.35%	12.50	30.56	0	0.00%	0.0	1	0.00%	0.3
Brewmaster	1	4.35%	12.50	30.56	0	0.00%	0.0	1	0.00%	0.3
Nature's Prophet	1	4.35%	12.50	30.56	0	0.00%	0.0	1	0.00%	0.3
Templar Assassin	1	4.35%	12.50	30.56	0	0.00%	0.0	1	0.00%	0.3
Ancient Apparition	1	4.35%	6.94	47.22	1	0.00%	0.3	0	0.00%	0.0
Queen of Pain	1	4.35%	5.56	30.56	0	0.00%	0.0	1	0.00%	0.3
Tidehunter	1	4.35%	4.17	47.22	1	0.00%	0.3	0	0.00%	0.0
Lich	1	4.35%	4.17	47.22	1	0.00%	0.3	0	0.00%	0.0
Leshrac	2	8.70%	1.39	59.72	0	0.00%	0.0	2	0.00%	0.5