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.
Number of bans is calculated approximately based on ratio of matches on the position to all matches of the hero.
Balance metric estimates how balanced the meta is (0 to 100)

Median hero picks (mp): 6 - Median hero bans (mb): 8 - Matches: 65

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

Balance rank	Winrate	Pickrate	Contest Rate
45.3	74.0	15.7	18.7

Hero	Position	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Beastmaster	Core Offlane	59	90.77%	100.00	75.69	22	72.73%	3.7	37	62.16%	4.6
Shadow Fiend	Core Midlane	20	30.77%	99.31	38.89	9	88.89%	1.5	11	50.00%	1.4
Disruptor	Support Offlane	8	12.31%	98.61	14.58	5	100.00%	0.8	3	53.85%	0.4
Medusa	Core Safelane	33	50.77%	97.92	72.92	7	85.71%	1.2	26	50.00%	3.3
Ember Spirit	Core Midlane	42	64.62%	97.22	80.56	17	58.82%	2.8	25	56.00%	3.1
Monkey King	Core Safelane	48	73.85%	96.53	85.42	8	50.00%	1.3	40	58.00%	5.0
Dark Seer	Core Offlane	17	26.15%	95.83	45.83	6	66.67%	1.0	11	72.73%	1.4
Batrider	Core Midlane	35	53.85%	95.14	83.33	12	66.67%	2.0	23	38.71%	2.9
Queen of Pain	Core Midlane	15	23.08%	94.44	49.31	6	66.67%	1.0	9	66.67%	1.1
Sven	Core Safelane	21	32.31%	93.75	66.67	9	55.56%	1.5	12	66.67%	1.5
Timbersaw	Core Offlane	20	30.77%	93.06	65.28	10	70.00%	1.7	10	41.67%	1.3
Magnus	Core Offlane	24	36.92%	92.36	77.78	13	61.54%	2.2	11	47.37%	1.4
Storm Spirit	Core Midlane	35	53.85%	91.67	86.11	10	40.00%	1.7	25	60.00%	3.1
Spirit Breaker	Support Offlane	12	18.46%	90.97	46.53	10	70.00%	1.7	2	33.33%	0.3
Lich	Support Safelane	7	10.77%	90.28	20.14	6	83.33%	1.0	1	0.00%	0.1
Techies	Support Safelane	11	16.92%	89.58	28.47	5	80.00%	0.8	6	50.00%	0.8
Templar Assassin	Core Safelane	35	53.85%	88.89	89.58	10	50.00%	1.7	25	48.00%	3.1
Disruptor	Support Safelane	28	43.08%	88.19	82.64	18	50.00%	3.0	10	53.85%	1.3
Bounty Hunter	Support Offlane	20	30.77%	87.50	68.75	7	85.71%	1.2	13	26.67%	1.6
Techies	Support Offlane	39	60.00%	86.81	95.14	18	44.44%	3.0	21	50.00%	2.6
Mars	Core Midlane	7	10.77%	86.11	18.75	3	100.00%	0.5	4	50.00%	0.5
Doom	Core Offlane	51	78.46%	85.42	99.31	18	33.33%	3.0	33	51.35%	4.1
Mirana	Support Offlane	9	13.85%	84.72	26.39	7	71.43%	1.2	2	50.00%	0.3
Pangolier	Core Midlane	30	46.15%	84.03	88.19	14	42.86%	2.3	16	55.56%	2.0
Skywrath Mage	Support Offlane	29	44.62%	83.33	90.28	17	47.06%	2.8	12	46.15%	1.5
Underlord	Core Offlane	27	41.54%	82.64	84.03	8	37.50%	1.3	19	57.14%	2.4
Oracle	Support Safelane	31	47.69%	81.94	91.67	15	46.67%	2.5	16	43.75%	2.0
Clockwerk	Support Offlane	17	26.15%	81.25	73.61	11	54.55%	1.8	6	50.00%	0.8
Troll Warlord	Core Safelane	14	21.54%	80.56	58.33	5	40.00%	0.8	9	77.78%	1.1
Silencer	Support Safelane	17	26.15%	79.86	72.22	8	62.50%	1.3	9	38.46%	1.1
Magnus	Core Safelane	11	16.92%	79.17	50.00	6	66.67%	1.0	5	47.37%	0.6
Chen	Support Safelane	3	4.62%	78.47	1.39	2	100.00%	0.3	1	100.00%	0.1
Chaos Knight	Core Safelane	18	27.69%	77.78	77.08	6	83.33%	1.0	12	21.43%	1.5
Juggernaut	Core Safelane	9	13.85%	77.08	43.75	7	71.43%	1.2	2	0.00%	0.3
Rubick	Support Offlane	36	55.38%	76.39	97.92	21	33.33%	3.5	15	56.25%	1.9
Slark	Core Safelane	31	47.69%	75.69	95.83	5	20.00%	0.8	26	50.00%	3.3
Dawnbreaker	Core Offlane	11	16.92%	75.00	53.47	3	33.33%	0.5	8	75.00%	1.0
Terrorblade	Core Safelane	33	50.77%	74.31	98.61	10	20.00%	1.7	23	52.17%	2.9
Magnus	Core Midlane	4	6.15%	73.61	15.28	2	100.00%	0.3	2	47.37%	0.3
Void Spirit	Core Midlane	23	35.38%	72.92	93.75	13	38.46%	2.2	10	45.45%	1.3
Pugna	Support Offlane	10	15.38%	72.22	56.25	5	60.00%	0.8	5	44.44%	0.6
Skywrath Mage	Support Safelane	3	4.62%	71.53	11.11	2	100.00%	0.3	1	46.15%	0.1
Alchemist	Core Safelane	18	27.69%	70.83	81.25	6	50.00%	1.0	12	38.89%	1.5
Crystal Maiden	Support Safelane	10	15.38%	70.14	63.89	8	50.00%	1.3	2	66.67%	0.3
Omniknight	Core Offlane	6	9.23%	69.44	22.92	3	66.67%	0.5	3	66.67%	0.4
Venomancer	Support Safelane	9	13.85%	68.75	50.69	4	50.00%	0.7	5	66.67%	0.6
Naga Siren	Core Safelane	24	36.92%	68.06	94.44	6	66.67%	1.0	18	22.22%	2.3
Snapfire	Core Midlane	4	6.15%	67.36	17.36	2	100.00%	0.3	2	37.50%	0.3
Undying	Support Safelane	21	32.31%	66.67	88.89	6	16.67%	1.0	15	60.00%	1.9
Bloodseeker	Core Safelane	37	56.92%	65.97	100.00	8	25.00%	1.3	29	37.93%	3.6
Morphling	Core Safelane	21	32.31%	65.28	90.97	6	66.67%	1.0	15	20.00%	1.9
Enchantress	Support Safelane	17	26.15%	64.58	81.94	6	33.33%	1.0	11	53.85%	1.4
Legion Commander	Core Offlane	12	18.46%	63.89	69.44	5	40.00%	0.8	7	60.00%	0.9
Tidehunter	Core Offlane	11	16.92%	63.19	70.83	6	33.33%	1.0	5	80.00%	0.6
Alchemist	Core Midlane	9	13.85%	62.50	54.86	3	66.67%	0.5	6	38.89%	0.8
Muerta	Core Safelane	9	13.85%	61.81	61.11	5	40.00%	0.8	4	75.00%	0.5
Clinkz	Support Offlane	8	12.31%	61.11	55.56	5	60.00%	0.8	3	25.00%	0.4
Keeper of the Light	Support Offlane	23	35.38%	60.42	96.53	9	33.33%	1.5	14	35.71%	1.8
Pugna	Support Safelane	6	9.23%	59.72	27.08	3	66.67%	0.5	3	44.44%	0.4
Clockwerk	Support Safelane	5	7.69%	59.03	23.61	3	66.67%	0.5	2	50.00%	0.3
Abaddon	Core Safelane	2	3.08%	58.33	2.08	1	100.00%	0.2	1	100.00%	0.1
Phantom Lancer	Core Safelane	12	18.46%	57.64	68.06	1	100.00%	0.2	11	36.36%	1.4
Ursa	Core Safelane	24	36.92%	56.94	97.22	6	50.00%	1.0	18	22.22%	2.3
Death Prophet	Core Offlane	6	9.23%	56.25	45.14	4	50.00%	0.7	2	66.67%	0.3
Snapfire	Core Offlane	9	13.85%	55.56	65.97	4	50.00%	0.7	5	37.50%	0.6
Monkey King	Core Midlane	12	18.46%	54.86	79.86	2	0.00%	0.3	10	58.00%	1.3
Invoker	Core Midlane	7	10.77%	54.17	52.08	3	33.33%	0.5	4	75.00%	0.5
Enchantress	Support Offlane	3	4.62%	53.47	15.97	1	100.00%	0.2	2	53.85%	0.3
Treant Protector	Support Safelane	9	13.85%	52.78	74.31	6	33.33%	1.0	3	75.00%	0.4
Dragon Knight	Core Midlane	5	7.69%	52.08	25.00	2	50.00%	0.3	3	66.67%	0.4
Doom	Core Safelane	3	4.62%	51.39	16.67	1	100.00%	0.2	2	51.35%	0.3
Venomancer	Core Offlane	2	3.08%	50.69	9.72	1	100.00%	0.2	1	66.67%	0.1
Death Prophet	Core Midlane	2	3.08%	50.00	10.42	1	100.00%	0.2	1	66.67%	0.1
Crystal Maiden	Support Offlane	5	7.69%	49.31	39.58	4	50.00%	0.7	1	66.67%	0.1
Legion Commander	Core Midlane	5	7.69%	48.61	25.69	2	50.00%	0.3	3	60.00%	0.4
Huskar	Core Midlane	6	9.23%	47.92	44.44	2	50.00%	0.3	4	50.00%	0.5
Puck	Core Midlane	15	23.08%	47.22	93.06	4	0.00%	0.7	11	54.55%	1.4
Lone Druid	Core Offlane	2	3.08%	46.53	11.81	1	100.00%	0.2	1	50.00%	0.1
Lone Druid	Core Safelane	2	3.08%	45.83	12.50	1	100.00%	0.2	1	50.00%	0.1
Batrider	Core Offlane	3	4.62%	45.14	18.06	1	100.00%	0.2	2	38.71%	0.3
Visage	Core Offlane	8	12.31%	44.44	75.00	5	40.00%	0.8	3	33.33%	0.4
Windranger	Core Offlane	2	3.08%	43.75	13.19	1	100.00%	0.2	1	42.86%	0.1
Windranger	Core Midlane	11	16.92%	43.06	87.50	7	28.57%	1.2	4	42.86%	0.5
Snapfire	Support Offlane	2	3.08%	42.36	13.89	1	100.00%	0.2	1	37.50%	0.1
Mirana	Support Safelane	6	9.23%	41.67	63.19	5	40.00%	0.8	1	50.00%	0.1
Tiny	Support Offlane	3	4.62%	40.97	20.83	2	50.00%	0.3	1	100.00%	0.1
Kunkka	Core Midlane	10	15.38%	40.28	79.17	1	0.00%	0.2	9	44.44%	1.1
Mars	Core Offlane	7	10.77%	39.58	64.58	3	33.33%	0.5	4	50.00%	0.5
Batrider	Support Offlane	6	9.23%	38.89	52.78	2	50.00%	0.3	4	38.71%	0.5
Necrophos	Core Offlane	1	1.54%	38.19	2.78	1	100.00%	0.2	0	0.00%	0.0
Ogre Magi	Core Offlane	1	1.54%	38.19	0.69	1	100.00%	0.2	0	0.00%	0.0
Mirana	Core Offlane	1	1.54%	36.81	3.47	1	100.00%	0.2	0	50.00%	0.0
Phoenix	Support Offlane	1	1.54%	36.11	4.86	1	100.00%	0.2	0	100.00%	0.0
Shadow Demon	Support Offlane	1	1.54%	36.11	4.86	1	100.00%	0.2	0	100.00%	0.0
Lich	Support Offlane	1	1.54%	34.72	5.56	1	100.00%	0.2	0	0.00%	0.0
Earth Spirit	Core Midlane	1	1.54%	34.03	6.25	1	100.00%	0.2	0	100.00%	0.0
Brewmaster	Core Offlane	1	1.54%	33.33	6.94	1	100.00%	0.2	0	0.00%	0.0
Phantom Assassin	Core Safelane	1	1.54%	32.64	8.33	1	100.00%	0.2	0	0.00%	0.0
Meepo	Core Safelane	1	1.54%	32.64	8.33	1	100.00%	0.2	0	0.00%	0.0
Elder Titan	Support Safelane	1	1.54%	31.25	9.03	1	100.00%	0.2	0	0.00%	0.0
Bounty Hunter	Core Offlane	3	4.62%	30.56	19.44	1	100.00%	0.2	2	26.67%	0.3
Timbersaw	Core Midlane	4	6.15%	29.86	34.72	2	50.00%	0.3	2	41.67%	0.3
Silencer	Support Offlane	7	10.77%	29.17	71.53	3	33.33%	0.5	4	38.46%	0.5
Tiny	Core Midlane	4	6.15%	28.47	47.22	3	33.33%	0.5	1	100.00%	0.1
Earth Spirit	Support Offlane	4	6.15%	27.78	47.92	3	33.33%	0.5	1	100.00%	0.1
Wraith King	Core Safelane	5	7.69%	27.08	57.64	3	33.33%	0.5	2	50.00%	0.3
Windranger	Core Safelane	5	7.69%	26.39	60.42	3	33.33%	0.5	2	42.86%	0.3
Centaur Warrunner	Core Offlane	3	4.62%	25.69	22.22	1	0.00%	0.2	2	100.00%	0.3
Tusk	Support Offlane	6	9.23%	25.00	78.47	4	25.00%	0.7	2	50.00%	0.3
Phoenix	Support Safelane	2	3.08%	24.31	21.53	2	50.00%	0.3	0	100.00%	0.0
Night Stalker	Core Offlane	4	6.15%	23.61	38.19	1	0.00%	0.2	3	66.67%	0.4
Tinker	Core Midlane	3	4.62%	22.92	35.42	2	50.00%	0.3	1	0.00%	0.1
Nyx Assassin	Support Offlane	3	4.62%	22.22	36.11	2	50.00%	0.3	1	0.00%	0.1
Medusa	Core Offlane	5	7.69%	21.53	56.94	1	0.00%	0.2	4	50.00%	0.5
Lifestealer	Core Safelane	4	6.15%	20.83	62.50	3	33.33%	0.5	1	0.00%	0.1
Shadow Fiend	Core Safelane	7	10.77%	20.14	84.72	3	0.00%	0.5	4	50.00%	0.5
Underlord	Core Midlane	3	4.62%	19.44	43.06	1	0.00%	0.2	2	57.14%	0.3
Witch Doctor	Core Offlane	2	3.08%	18.75	24.31	1	0.00%	0.2	1	100.00%	0.1
Doom	Support Offlane	3	4.62%	18.06	48.61	1	0.00%	0.2	2	51.35%	0.3
Pangolier	Core Offlane	4	6.15%	17.36	70.14	2	0.00%	0.3	2	55.56%	0.3
Luna	Core Safelane	3	4.62%	16.67	59.72	2	0.00%	0.3	1	100.00%	0.1
Shadow Demon	Support Safelane	3	4.62%	15.97	59.03	2	0.00%	0.3	1	100.00%	0.1
Treant Protector	Support Offlane	2	3.08%	15.28	27.78	1	0.00%	0.2	1	75.00%	0.1
Batrider	Support Safelane	3	4.62%	14.58	54.17	1	0.00%	0.2	2	38.71%	0.3
Pugna	Core Midlane	4	6.15%	13.89	76.39	2	0.00%	0.3	2	44.44%	0.3
Rubick	Core Offlane	2	3.08%	13.19	37.50	1	0.00%	0.2	1	56.25%	0.1
Rubick	Support Safelane	2	3.08%	12.50	36.81	1	0.00%	0.2	1	56.25%	0.1
Techies	Core Offlane	2	3.08%	11.81	40.28	1	0.00%	0.2	1	50.00%	0.1
Magnus	Support Offlane	2	3.08%	11.11	40.97	1	0.00%	0.2	1	47.37%	0.1
Void Spirit	Core Offlane	2	3.08%	10.42	41.67	1	0.00%	0.2	1	45.45%	0.1
Void Spirit	Core Safelane	2	3.08%	9.72	42.36	1	0.00%	0.2	1	45.45%	0.1
Chaos Knight	Core Offlane	3	4.62%	9.03	61.81	1	0.00%	0.2	2	21.43%	0.3
Clinkz	Core Offlane	2	3.08%	8.33	51.39	1	0.00%	0.2	1	25.00%	0.1
Spirit Breaker	Core Offlane	4	6.15%	7.64	86.81	3	0.00%	0.5	1	33.33%	0.1
Winter Wyvern	Support Safelane	1	1.54%	6.94	33.33	1	0.00%	0.2	0	0.00%	0.0
Nyx Assassin	Core Midlane	1	1.54%	6.25	34.03	1	0.00%	0.2	0	0.00%	0.0
Phoenix	Core Offlane	2	3.08%	5.56	67.36	2	0.00%	0.3	0	100.00%	0.0
Meepo	Core Midlane	1	1.54%	4.86	31.94	1	0.00%	0.2	0	0.00%	0.0
Ogre Magi	Support Safelane	1	1.54%	4.17	31.25	1	0.00%	0.2	0	0.00%	0.0
Mirana	Core Midlane	1	1.54%	3.47	29.17	1	0.00%	0.2	0	50.00%	0.0
Nyx Assassin	Core Offlane	1	1.54%	2.78	29.86	1	0.00%	0.2	0	0.00%	0.0
Spirit Breaker	Core Midlane	1	1.54%	2.08	32.64	1	0.00%	0.2	0	33.33%	0.0
Spirit Breaker	Support Safelane	1	1.54%	1.39	30.56	1	0.00%	0.2	0	33.33%	0.0
Dark Willow	Support Offlane	4	6.15%	0.69	93.06	3	0.00%	0.5	1	0.00%	0.1