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: 31

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

Balance rank	Winrate	Pickrate	Contest Rate
44.1	41.7	50.8	37.7

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Dragon Knight	15	48.39%	100.00	18.09	7	85.71%	2.3	8	87.50%	2.0
Enigma	15	48.39%	98.94	20.21	4	100.00%	1.3	11	72.73%	2.8
Marci	26	83.87%	97.87	77.66	10	70.00%	3.3	16	50.00%	4.0
Batrider	17	54.84%	96.81	52.13	3	100.00%	1.0	14	57.14%	3.5
Terrorblade	16	51.61%	95.74	48.94	4	75.00%	1.3	12	66.67%	3.0
Beastmaster	23	74.19%	94.68	76.60	4	50.00%	1.3	19	63.16%	4.8
Luna	4	12.90%	93.62	1.06	3	100.00%	1.0	1	100.00%	0.3
Death Prophet	7	22.58%	92.55	12.77	5	100.00%	1.7	2	0.00%	0.5
Tusk	12	38.71%	91.49	46.81	8	75.00%	2.7	4	50.00%	1.0
Kunkka	7	22.58%	90.43	7.45	1	100.00%	0.3	6	83.33%	1.5
Tiny	23	74.19%	89.36	80.85	16	56.25%	5.3	7	57.14%	1.8
Ember Spirit	17	54.84%	88.30	62.77	7	71.43%	2.3	10	50.00%	2.5
Medusa	16	51.61%	87.23	60.64	5	60.00%	1.7	11	63.64%	2.8
Lycan	14	45.16%	86.17	56.38	5	80.00%	1.7	9	44.44%	2.3
Snapfire	11	35.48%	85.11	53.19	9	66.67%	3.0	2	50.00%	0.5
Viper	26	83.87%	84.04	85.11	4	75.00%	1.3	22	40.91%	5.5
Nature's Prophet	12	38.71%	82.98	55.32	6	50.00%	2.0	6	83.33%	1.5
Puck	27	87.10%	81.91	93.62	13	61.54%	4.3	14	14.29%	3.5
Necrophos	8	25.81%	80.85	34.04	4	75.00%	1.3	4	50.00%	1.0
Mars	11	35.48%	79.79	54.26	4	75.00%	1.3	7	42.86%	1.8
Lifestealer	5	16.13%	78.72	10.64	1	100.00%	0.3	4	75.00%	1.0
Dazzle	8	25.81%	77.66	47.87	8	62.50%	2.7	0	0.00%	0.0
Templar Assassin	14	45.16%	76.60	74.47	5	60.00%	1.7	9	44.44%	2.3
Razor	21	67.74%	75.53	88.30	8	50.00%	2.7	13	38.46%	3.3
Sniper	5	16.13%	74.47	15.96	3	66.67%	1.0	2	100.00%	0.5
Bloodseeker	12	38.71%	73.40	64.89	3	66.67%	1.0	9	44.44%	2.3
Chaos Knight	17	54.84%	72.34	81.91	5	20.00%	1.7	12	66.67%	3.0
Enchantress	23	74.19%	71.28	94.68	10	20.00%	3.3	13	69.23%	3.3
Monkey King	13	41.94%	70.21	75.53	3	33.33%	1.0	10	60.00%	2.5
Timbersaw	26	83.87%	69.15	97.87	7	0.00%	2.3	19	63.16%	4.8
Zeus	8	25.81%	68.09	51.06	4	50.00%	1.3	4	75.00%	1.0
Shadow Shaman	2	6.45%	67.02	3.19	2	100.00%	0.7	0	0.00%	0.0
Void Spirit	13	41.94%	65.96	78.72	2	100.00%	0.7	11	27.27%	2.8
Weaver	4	12.90%	64.89	17.02	3	66.67%	1.0	1	100.00%	0.3
Dawnbreaker	21	67.74%	63.83	96.81	16	37.50%	5.3	5	20.00%	1.3
Winter Wyvern	9	29.03%	62.77	63.83	5	60.00%	1.7	4	25.00%	1.0
Crystal Maiden	3	9.68%	61.70	9.57	2	100.00%	0.7	1	0.00%	0.3
Ursa	3	9.68%	61.70	9.57	2	100.00%	0.7	1	0.00%	0.3
Bristleback	10	32.26%	59.57	69.15	3	0.00%	1.0	7	85.71%	1.8
Alchemist	8	25.81%	58.51	59.57	2	100.00%	0.7	6	16.67%	1.5
Pangolier	6	19.35%	57.45	35.11	1	100.00%	0.3	5	40.00%	1.3
Mirana	5	16.13%	56.38	45.74	4	50.00%	1.3	1	100.00%	0.3
Lone Druid	9	29.03%	55.32	65.96	2	0.00%	0.7	7	71.43%	1.8
Chen	12	38.71%	54.26	82.98	4	50.00%	1.3	8	25.00%	2.0
Bane	4	12.90%	53.19	32.98	3	66.67%	1.0	1	0.00%	0.3
Io	15	48.39%	52.13	95.74	4	50.00%	1.3	11	18.18%	2.8
Doom	7	22.58%	51.06	68.09	5	40.00%	1.7	2	50.00%	0.5
Abaddon	4	12.90%	50.00	27.66	1	100.00%	0.3	3	33.33%	0.8
Legion Commander	3	9.68%	48.94	19.15	2	50.00%	0.7	1	100.00%	0.3
Centaur Warrunner	1	3.23%	47.87	6.38	1	100.00%	0.3	0	0.00%	0.0
Brewmaster	1	3.23%	47.87	6.38	1	100.00%	0.3	0	0.00%	0.0
Warlock	1	3.23%	47.87	6.38	1	100.00%	0.3	0	0.00%	0.0
Visage	11	35.48%	44.68	86.17	2	0.00%	0.7	9	44.44%	2.3
Leshrac	4	12.90%	43.62	37.23	2	50.00%	0.7	2	50.00%	0.5
Wraith King	4	12.90%	43.62	37.23	2	50.00%	0.7	2	50.00%	0.5
Lina	2	6.45%	41.49	11.70	1	100.00%	0.3	1	0.00%	0.3
Storm Spirit	4	12.90%	40.43	30.85	0	0.00%	0.0	4	50.00%	1.0
Underlord	6	19.35%	39.36	73.40	3	0.00%	1.0	3	100.00%	0.8
Faceless Void	11	35.48%	38.30	90.43	1	0.00%	0.3	10	30.00%	2.5
Earth Spirit	3	9.68%	37.23	28.72	1	0.00%	0.3	2	100.00%	0.5
Phoenix	3	9.68%	36.17	29.79	1	100.00%	0.3	2	0.00%	0.5
Hoodwink	6	19.35%	35.11	79.79	4	25.00%	1.3	2	50.00%	0.5
Juggernaut	9	29.03%	34.04	89.36	3	0.00%	1.0	6	50.00%	1.5
Night Stalker	10	32.26%	32.98	91.49	3	0.00%	1.0	7	42.86%	1.8
Troll Warlord	2	6.45%	31.91	26.60	2	50.00%	0.7	0	0.00%	0.0
Naga Siren	1	3.23%	30.85	2.13	0	0.00%	0.0	1	100.00%	0.3
Nyx Assassin	4	12.90%	29.79	58.51	2	50.00%	0.7	2	0.00%	0.5
Ancient Apparition	4	12.90%	29.79	58.51	2	50.00%	0.7	2	0.00%	0.5
Keeper of the Light	7	22.58%	27.66	87.23	3	0.00%	1.0	4	50.00%	1.0
Venomancer	2	6.45%	26.60	14.89	0	0.00%	0.0	2	50.00%	0.5
Morphling	2	6.45%	26.60	14.89	0	0.00%	0.0	2	50.00%	0.5
Skywrath Mage	7	22.58%	24.47	92.55	5	0.00%	1.7	2	100.00%	0.5
Drow Ranger	2	6.45%	23.40	31.91	1	0.00%	0.3	1	100.00%	0.3
Invoker	4	12.90%	22.34	67.02	1	0.00%	0.3	3	33.33%	0.8
Axe	1	3.23%	21.28	44.68	1	0.00%	0.3	0	0.00%	0.0
Vengeful Spirit	1	3.23%	21.28	44.68	1	0.00%	0.3	0	0.00%	0.0
Lion	1	3.23%	21.28	44.68	1	0.00%	0.3	0	0.00%	0.0
Bounty Hunter	1	3.23%	21.28	44.68	1	0.00%	0.3	0	0.00%	0.0
Spectre	1	3.23%	21.28	44.68	1	0.00%	0.3	0	0.00%	0.0
Treant Protector	1	3.23%	21.28	44.68	1	0.00%	0.3	0	0.00%	0.0
Rubick	1	3.23%	21.28	44.68	1	0.00%	0.3	0	0.00%	0.0
Clockwerk	6	19.35%	13.83	100.00	5	0.00%	1.7	1	0.00%	0.3
Grimstroke	3	9.68%	12.77	84.04	3	0.00%	1.0	0	0.00%	0.0
Anti-Mage	1	3.23%	11.70	25.53	0	0.00%	0.0	1	0.00%	0.3
Phantom Lancer	1	3.23%	11.70	25.53	0	0.00%	0.0	1	0.00%	0.3
Jakiro	2	6.45%	9.57	72.34	2	0.00%	0.7	0	0.00%	0.0
Huskar	1	3.23%	8.51	25.53	0	0.00%	0.0	1	0.00%	0.3
Dark Seer	1	3.23%	8.51	25.53	0	0.00%	0.0	1	0.00%	0.3
Pugna	2	6.45%	6.38	61.70	1	0.00%	0.3	1	0.00%	0.3
Phantom Assassin	2	6.45%	5.32	50.00	0	0.00%	0.0	2	0.00%	0.5
Sven	5	16.13%	4.26	98.94	4	0.00%	1.3	1	0.00%	0.3
Windranger	2	6.45%	3.19	72.34	2	0.00%	0.7	0	0.00%	0.0
Pudge	2	6.45%	3.19	72.34	2	0.00%	0.7	0	0.00%	0.0
Tidehunter	1	3.23%	1.06	25.53	0	0.00%	0.0	1	0.00%	0.3