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): 7 - Median hero bans (mb): 12 - Matches: 90

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

Balance rank	Winrate	Pickrate	Contest Rate
64.0	85.1	45.5	38.0

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Razor	19	21.11%	100.00	17.35	6	100.00%	0.9	13	61.54%	1.1
Lina	63	70.00%	98.98	67.35	15	46.67%	2.1	48	66.67%	4.0
Dark Seer	26	28.89%	97.96	28.57	10	80.00%	1.4	16	62.50%	1.3
Winter Wyvern	6	6.67%	96.94	2.04	5	100.00%	0.7	1	100.00%	0.1
Weaver	80	88.89%	95.92	82.65	15	80.00%	2.1	65	44.62%	5.4
Ursa	52	57.78%	94.90	58.16	11	54.55%	1.6	41	63.41%	3.4
Bane	42	46.67%	93.88	48.98	25	64.00%	3.6	17	58.82%	1.4
Tidehunter	72	80.00%	92.86	78.57	36	63.89%	5.1	36	38.89%	3.0
Undying	42	46.67%	91.84	51.02	24	66.67%	3.4	18	50.00%	1.5
Puck	61	67.78%	90.82	76.53	15	66.67%	2.1	46	47.83%	3.8
Terrorblade	44	48.89%	89.80	57.14	14	50.00%	2.0	30	66.67%	2.5
Enchantress	32	35.56%	88.78	39.80	14	64.29%	2.0	18	61.11%	1.5
Snapfire	62	68.89%	87.76	85.71	50	52.00%	7.1	12	50.00%	1.0
Wraith King	30	33.33%	86.73	41.84	11	72.73%	1.6	19	47.37%	1.6
Kunkka	45	50.00%	85.71	69.39	19	57.89%	2.7	26	50.00%	2.2
Mars	82	91.11%	84.69	94.90	35	45.71%	5.0	47	48.94%	3.9
Lion	51	56.67%	83.67	81.63	41	48.78%	5.9	10	70.00%	0.8
Monkey King	85	94.44%	82.65	97.96	27	51.85%	3.9	58	39.66%	4.8
Ember Spirit	72	80.00%	81.63	92.86	26	53.85%	3.7	46	39.13%	3.8
Medusa	27	30.00%	80.61	42.86	10	70.00%	1.4	17	47.06%	1.4
Earth Spirit	23	25.56%	79.59	40.82	14	64.29%	2.0	9	44.44%	0.8
Invoker	56	62.22%	78.57	87.76	7	42.86%	1.0	49	48.98%	4.1
Templar Assassin	30	33.33%	77.55	60.20	11	54.55%	1.6	19	52.63%	1.6
Dawnbreaker	56	62.22%	76.53	90.82	15	40.00%	2.1	41	48.78%	3.4
Vengeful Spirit	6	6.67%	75.51	8.16	5	80.00%	0.7	1	100.00%	0.1
Doom	36	40.00%	74.49	75.51	13	46.15%	1.9	23	52.17%	1.9
Queen of Pain	23	25.56%	73.47	50.00	10	50.00%	1.4	13	61.54%	1.1
Morphling	35	38.89%	72.45	73.47	10	40.00%	1.4	25	56.00%	2.1
Batrider	23	25.56%	71.43	44.90	6	50.00%	0.9	17	58.82%	1.4
Magnus	41	45.56%	70.41	84.69	13	30.77%	1.9	28	60.71%	2.3
Bloodseeker	18	20.00%	69.39	34.69	4	50.00%	0.6	14	64.29%	1.2
Spirit Breaker	8	8.89%	68.37	11.22	4	75.00%	0.6	4	75.00%	0.3
Faceless Void	27	30.00%	67.35	59.18	6	33.33%	0.9	21	61.90%	1.8
Phantom Lancer	37	41.11%	66.33	77.55	3	33.33%	0.4	34	50.00%	2.8
Storm Spirit	50	55.56%	65.31	91.84	16	25.00%	2.3	34	58.82%	2.8
Nature's Prophet	21	23.33%	64.29	54.08	13	53.85%	1.9	8	50.00%	0.7
Earthshaker	5	5.56%	63.27	9.18	5	80.00%	0.7	0	0.00%	0.0
Leshrac	23	25.56%	62.24	61.22	11	63.64%	1.6	12	25.00%	1.0
Tusk	11	12.22%	61.22	32.65	9	55.56%	1.3	2	100.00%	0.2
Mirana	21	23.33%	60.20	56.12	11	45.45%	1.6	10	60.00%	0.8
Dragon Knight	23	25.56%	59.18	68.37	17	47.06%	2.4	6	50.00%	0.5
Pangolier	25	27.78%	58.16	72.45	18	50.00%	2.6	7	28.57%	0.6
Spectre	22	24.44%	57.14	62.24	9	55.56%	1.3	13	38.46%	1.1
Grimstroke	41	45.56%	56.12	93.88	29	34.48%	4.1	12	58.33%	1.0
Luna	22	24.44%	55.10	64.29	10	40.00%	1.4	12	58.33%	1.0
Slark	23	25.56%	54.08	65.31	7	42.86%	1.0	16	50.00%	1.3
Beastmaster	26	28.89%	53.06	74.49	10	40.00%	1.4	16	50.00%	1.3
Nyx Assassin	12	13.33%	52.04	35.71	8	50.00%	1.1	4	75.00%	0.3
Oracle	10	11.11%	51.02	27.55	5	60.00%	0.7	5	60.00%	0.4
Death Prophet	7	7.78%	50.00	16.33	3	100.00%	0.4	4	25.00%	0.3
Void Spirit	42	46.67%	48.98	98.98	20	35.00%	2.9	22	36.36%	1.8
Elder Titan	26	28.89%	47.96	83.67	11	27.27%	1.6	15	60.00%	1.3
Phantom Assassin	16	17.78%	46.94	53.06	7	42.86%	1.0	9	55.56%	0.8
Abaddon	9	10.00%	45.92	29.59	5	60.00%	0.7	4	50.00%	0.3
Clockwerk	10	11.11%	44.90	38.78	10	50.00%	1.4	0	0.00%	0.0
Rubick	16	17.78%	43.88	66.33	12	41.67%	1.7	4	50.00%	0.3
Naga Siren	13	14.44%	42.86	52.04	7	42.86%	1.0	6	50.00%	0.5
Dark Willow	7	7.78%	41.84	30.61	6	50.00%	0.9	1	100.00%	0.1
Lifestealer	33	36.67%	40.82	95.92	5	20.00%	0.7	28	35.71%	2.3
Tinker	13	14.44%	39.80	46.94	3	0.00%	0.4	10	70.00%	0.8
Skywrath Mage	2	2.22%	38.78	1.02	1	100.00%	0.1	1	100.00%	0.1
Troll Warlord	13	14.44%	37.76	55.10	4	50.00%	0.6	9	33.33%	0.8
Shadow Demon	7	7.78%	36.73	33.67	5	60.00%	0.7	2	0.00%	0.2
Io	19	21.11%	35.71	86.73	8	25.00%	1.1	11	45.45%	0.9
Disruptor	16	17.78%	34.69	80.61	10	30.00%	1.4	6	50.00%	0.5
Necrophos	3	3.33%	33.67	10.20	3	66.67%	0.4	0	0.00%	0.0
Venomancer	3	3.33%	32.65	6.12	1	100.00%	0.1	2	50.00%	0.2
Windranger	8	8.89%	31.63	43.88	7	42.86%	1.0	1	0.00%	0.1
Silencer	14	15.56%	30.61	79.59	8	25.00%	1.1	6	50.00%	0.5
Brewmaster	10	11.11%	29.59	47.96	3	33.33%	0.4	7	42.86%	0.6
Centaur Warrunner	1	1.11%	28.57	5.10	1	100.00%	0.1	0	0.00%	0.0
Enigma	1	1.11%	28.57	5.10	1	100.00%	0.1	0	0.00%	0.0
Bounty Hunter	1	1.11%	28.57	5.10	1	100.00%	0.1	0	0.00%	0.0
Legion Commander	19	21.11%	25.51	96.94	7	14.29%	1.0	12	33.33%	1.0
Juggernaut	15	16.67%	24.49	88.78	4	25.00%	0.6	11	27.27%	0.9
Viper	15	16.67%	23.47	89.80	5	20.00%	0.7	10	30.00%	0.8
Timbersaw	2	2.22%	22.45	7.14	1	100.00%	0.1	1	0.00%	0.1
Pugna	2	2.22%	21.43	15.31	2	50.00%	0.3	0	0.00%	0.0
Chen	2	2.22%	21.43	15.31	2	50.00%	0.3	0	0.00%	0.0
Ancient Apparition	2	2.22%	21.43	15.31	2	50.00%	0.3	0	0.00%	0.0
Ogre Magi	2	2.22%	21.43	15.31	2	50.00%	0.3	0	0.00%	0.0
Phoenix	3	3.33%	17.35	25.51	2	50.00%	0.3	1	0.00%	0.1
Night Stalker	15	16.67%	16.33	100.00	4	0.00%	0.6	11	27.27%	0.9
Tiny	4	4.44%	15.31	36.73	3	33.33%	0.4	1	0.00%	0.1
Gyrocopter	8	8.89%	14.29	71.43	2	0.00%	0.3	6	33.33%	0.5
Slardar	3	3.33%	13.27	18.37	0	0.00%	0.0	3	33.33%	0.3
Lycan	4	4.44%	12.24	31.63	0	0.00%	0.0	4	25.00%	0.3
Anti-Mage	3	3.33%	11.22	26.53	1	0.00%	0.1	2	50.00%	0.2
Huskar	4	4.44%	10.20	37.76	1	0.00%	0.1	3	33.33%	0.3
Riki	5	5.56%	9.18	45.92	1	0.00%	0.1	4	25.00%	0.3
Sven	6	6.67%	8.16	70.41	2	0.00%	0.3	4	25.00%	0.3
Axe	1	1.11%	7.14	24.49	1	0.00%	0.1	0	0.00%	0.0
Clinkz	1	1.11%	7.14	24.49	1	0.00%	0.1	0	0.00%	0.0
Bristleback	1	1.11%	7.14	24.49	1	0.00%	0.1	0	0.00%	0.0
Drow Ranger	3	3.33%	4.08	63.27	3	0.00%	0.4	0	0.00%	0.0
Witch Doctor	1	1.11%	3.06	24.49	1	0.00%	0.1	0	0.00%	0.0
Sand King	1	1.11%	3.06	24.49	1	0.00%	0.1	0	0.00%	0.0
Crystal Maiden	1	1.11%	3.06	24.49	1	0.00%	0.1	0	0.00%	0.0