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): 28 - Median hero bans (mb): 1 - Matches: 90

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

Balance rank	Winrate	Pickrate	Contest Rate
64.5	85.3	46.2	38.7

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Terrorblade	49	54.44%	100.00	40.95	21	80.95%	0.8	28	53.57%	28.0
Earth Spirit	37	41.11%	99.05	37.14	21	76.19%	0.8	16	56.25%	16.0
Enchantress	65	72.22%	98.10	67.62	22	54.55%	0.8	43	67.44%	43.0
Beastmaster	70	77.78%	97.14	74.29	18	66.67%	0.6	52	51.92%	52.0
Batrider	77	85.56%	96.19	79.05	12	50.00%	0.4	65	58.46%	65.0
Invoker	57	63.33%	95.24	66.67	20	60.00%	0.7	37	59.46%	37.0
Storm Spirit	35	38.89%	94.29	47.62	13	61.54%	0.5	22	68.18%	22.0
Axe	31	34.44%	93.33	42.86	14	64.29%	0.5	17	64.71%	17.0
Elder Titan	30	33.33%	92.38	44.76	23	69.57%	0.8	7	28.57%	7.0
Monkey King	14	15.56%	91.43	15.24	5	100.00%	0.2	9	55.56%	9.0
Nature's Prophet	68	75.56%	90.48	87.62	28	53.57%	1.0	40	47.50%	40.0
Legion Commander	50	55.56%	89.52	73.33	16	56.25%	0.6	34	52.94%	34.0
Ember Spirit	66	73.33%	88.57	85.71	16	62.50%	0.6	50	44.00%	50.0
Treant Protector	14	15.56%	87.62	22.86	11	81.82%	0.4	3	0.00%	3.0
Witch Doctor	15	16.67%	86.67	26.67	13	69.23%	0.5	2	50.00%	2.0
Anti-Mage	26	28.89%	85.71	46.67	7	57.14%	0.3	19	63.16%	19.0
Ancient Apparition	22	24.44%	84.76	40.00	10	70.00%	0.4	12	50.00%	12.0
Mirana	53	58.89%	83.81	81.90	21	52.38%	0.8	32	46.88%	32.0
Phoenix	56	62.22%	82.86	84.76	17	47.06%	0.6	39	51.28%	39.0
Arc Warden	22	24.44%	81.90	38.10	7	42.86%	0.3	15	80.00%	15.0
Kunkka	47	52.22%	80.95	77.14	14	42.86%	0.5	33	57.58%	33.0
Death Prophet	37	41.11%	80.00	69.52	11	63.64%	0.4	26	46.15%	26.0
Lina	31	34.44%	79.05	61.90	6	50.00%	0.2	25	60.00%	25.0
Venomancer	27	30.00%	78.10	57.14	11	72.73%	0.4	16	37.50%	16.0
Tiny	71	78.89%	77.14	98.10	35	37.14%	1.3	36	55.56%	36.0
Faceless Void	52	57.78%	76.19	92.38	11	54.55%	0.4	41	39.02%	41.0
Morphling	51	56.67%	75.24	91.43	14	64.29%	0.5	37	29.73%	37.0
Leshrac	28	31.11%	74.29	70.48	14	50.00%	0.5	14	50.00%	14.0
Sven	38	42.22%	73.33	82.86	19	42.11%	0.7	19	52.63%	19.0
Lifestealer	33	36.67%	72.38	75.24	13	53.85%	0.5	20	40.00%	20.0
Bloodseeker	33	36.67%	71.43	80.00	19	42.11%	0.7	14	57.14%	14.0
Silencer	16	17.78%	70.48	45.71	11	54.55%	0.4	5	60.00%	5.0
Sand King	18	20.00%	69.52	59.05	14	57.14%	0.5	4	25.00%	4.0
Void Spirit	59	65.56%	68.57	100.00	21	47.62%	0.8	38	28.95%	38.0
Spectre	51	56.67%	67.62	97.14	23	34.78%	0.8	28	46.43%	28.0
Ogre Magi	14	15.56%	66.67	48.57	12	58.33%	0.4	2	0.00%	2.0
Windranger	33	36.67%	65.71	89.52	27	44.44%	1.0	6	16.67%	6.0
Dazzle	5	5.56%	64.76	6.67	4	75.00%	0.1	1	100.00%	1.0
Necrophos	17	18.89%	63.81	50.48	6	66.67%	0.2	11	36.36%	11.0
Gyrocopter	17	18.89%	62.86	60.95	9	44.44%	0.3	8	62.50%	8.0
Phantom Assassin	7	7.78%	61.90	19.05	5	60.00%	0.2	2	100.00%	2.0
Clockwerk	36	40.00%	60.95	95.24	21	38.10%	0.8	15	40.00%	15.0
Ursa	6	6.67%	60.00	7.62	2	50.00%	0.1	4	100.00%	4.0
Magnus	17	18.89%	59.05	58.10	5	60.00%	0.2	12	41.67%	12.0
Juggernaut	14	15.56%	58.10	54.29	10	50.00%	0.4	4	50.00%	4.0
Pangolier	15	16.67%	57.14	53.33	7	57.14%	0.3	8	37.50%	8.0
Queen of Pain	31	34.44%	56.19	86.67	4	25.00%	0.1	27	44.44%	27.0
Drow Ranger	21	23.33%	55.24	71.43	11	45.45%	0.4	10	40.00%	10.0
Zeus	15	16.67%	54.29	60.00	8	37.50%	0.3	7	71.43%	7.0
Lich	10	11.11%	53.33	39.05	9	55.56%	0.3	1	0.00%	1.0
Troll Warlord	18	20.00%	52.38	68.57	9	44.44%	0.3	9	44.44%	9.0
Warlock	9	10.00%	51.43	28.57	5	60.00%	0.2	4	50.00%	4.0
Slark	7	7.78%	50.48	16.19	2	100.00%	0.1	5	40.00%	5.0
Rubick	29	32.22%	49.52	93.33	17	35.29%	0.6	12	41.67%	12.0
Mars	13	14.44%	48.57	55.24	8	37.50%	0.3	5	80.00%	5.0
Nyx Assassin	2	2.22%	47.62	4.76	2	100.00%	0.1	0	0.00%	0.0
Tusk	13	14.44%	46.67	62.86	11	45.45%	0.4	2	50.00%	2.0
Timbersaw	17	18.89%	45.71	65.71	6	50.00%	0.2	11	36.36%	11.0
Chen	9	10.00%	44.76	32.38	4	25.00%	0.1	5	100.00%	5.0
Viper	17	18.89%	43.81	63.81	1	0.00%	0.0	16	50.00%	16.0
Underlord	18	20.00%	42.86	72.38	7	42.86%	0.3	11	36.36%	11.0
Broodmother	6	6.67%	41.90	17.14	2	50.00%	0.1	4	75.00%	4.0
Puck	19	21.11%	40.95	80.95	8	25.00%	0.3	11	54.55%	11.0
Phantom Lancer	20	22.22%	40.00	76.19	4	25.00%	0.1	16	43.75%	16.0
Lycan	2	2.22%	39.05	0.95	1	100.00%	0.0	1	100.00%	1.0
Dark Willow	6	6.67%	38.10	24.76	5	60.00%	0.2	1	0.00%	1.0
Slardar	11	12.22%	37.14	41.90	2	0.00%	0.1	9	66.67%	9.0
Centaur Warrunner	20	22.22%	36.19	88.57	10	20.00%	0.4	10	60.00%	10.0
Vengeful Spirit	16	17.78%	35.24	83.81	14	28.57%	0.5	2	100.00%	2.0
Keeper of the Light	3	3.33%	34.29	8.57	3	66.67%	0.1	0	0.00%	0.0
Io	23	25.56%	33.33	99.05	15	20.00%	0.5	8	50.00%	8.0
Medusa	10	11.11%	32.38	64.76	6	33.33%	0.2	4	50.00%	4.0
Dark Seer	2	2.22%	31.43	3.81	0	0.00%	0.0	2	100.00%	2.0
Bane	5	5.56%	30.48	29.52	4	50.00%	0.1	1	0.00%	1.0
Bristleback	1	1.11%	29.52	2.86	1	100.00%	0.0	0	0.00%	0.0
Disruptor	1	1.11%	29.52	2.86	1	100.00%	0.0	0	0.00%	0.0
Earthshaker	5	5.56%	27.62	36.19	5	40.00%	0.2	0	0.00%	0.0
Dragon Knight	5	5.56%	26.67	25.71	2	50.00%	0.1	3	33.33%	3.0
Brewmaster	2	2.22%	25.71	5.71	1	100.00%	0.0	1	0.00%	1.0
Oracle	5	5.56%	24.76	35.24	3	33.33%	0.1	2	50.00%	2.0
Pudge	2	2.22%	23.81	14.29	2	50.00%	0.1	0	0.00%	0.0
Bounty Hunter	2	2.22%	23.81	14.29	2	50.00%	0.1	0	0.00%	0.0
Enigma	4	4.44%	21.90	23.81	1	0.00%	0.0	3	66.67%	3.0
Pugna	3	3.33%	20.95	21.90	2	50.00%	0.1	1	0.00%	1.0
Night Stalker	4	4.44%	20.00	30.48	2	0.00%	0.1	2	100.00%	2.0
Templar Assassin	4	4.44%	19.05	31.43	2	50.00%	0.1	2	0.00%	2.0
Undying	11	12.22%	18.10	96.19	6	16.67%	0.2	5	20.00%	5.0
Jakiro	3	3.33%	17.14	27.62	3	33.33%	0.1	0	0.00%	0.0
Winter Wyvern	5	5.56%	16.19	51.43	3	0.00%	0.1	2	100.00%	2.0
Chaos Knight	5	5.56%	15.24	52.38	3	33.33%	0.1	2	0.00%	2.0
Crystal Maiden	8	8.89%	14.29	94.29	7	14.29%	0.3	1	0.00%	1.0
Huskar	2	2.22%	13.33	18.10	1	0.00%	0.0	1	100.00%	1.0
Tidehunter	5	5.56%	12.38	56.19	1	0.00%	0.0	4	25.00%	4.0
Doom	4	4.44%	11.43	49.52	2	0.00%	0.1	2	50.00%	2.0
Abaddon	5	5.56%	10.48	90.48	4	0.00%	0.1	1	0.00%	1.0
Spirit Breaker	1	1.11%	9.52	20.95	1	0.00%	0.0	0	0.00%	0.0
Outworld Destroyer	1	1.11%	8.57	12.38	0	0.00%	0.0	1	0.00%	1.0
Shadow Shaman	1	1.11%	7.62	20.95	1	0.00%	0.0	0	0.00%	0.0
Snapfire	4	4.44%	6.67	78.10	3	0.00%	0.1	1	0.00%	1.0
Riki	1	1.11%	5.71	12.38	0	0.00%	0.0	1	0.00%	1.0
Wraith King	1	1.11%	5.71	12.38	0	0.00%	0.0	1	0.00%	1.0
Weaver	2	2.22%	3.81	43.81	2	0.00%	0.1	0	0.00%	0.0
Meepo	1	1.11%	2.86	12.38	0	0.00%	0.0	1	0.00%	1.0
Naga Siren	2	2.22%	1.90	34.29	1	0.00%	0.0	1	0.00%	1.0
Grimstroke	2	2.22%	1.90	34.29	1	0.00%	0.0	1	0.00%	1.0