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): 4 - Median hero bans (mb): 6 - Matches: 50

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

Balance rank	Winrate	Pickrate	Contest Rate
58.5	82.1	36.4	32.2

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Tiny	37	74.00%	100.00	54.44	14	57.14%	3.5	23	78.26%	3.8
Templar Assassin	44	88.00%	98.89	70.00	13	76.92%	3.3	31	48.39%	5.2
Beastmaster	23	46.00%	97.78	40.00	2	100.00%	0.5	21	66.67%	3.5
Treant Protector	26	52.00%	96.67	52.22	18	77.78%	4.5	8	12.50%	1.3
Vengeful Spirit	11	22.00%	95.56	14.44	5	80.00%	1.3	6	83.33%	1.0
Lina	17	34.00%	94.44	33.33	2	100.00%	0.5	15	66.67%	2.5
Keeper of the Light	44	88.00%	93.33	81.11	14	64.29%	3.5	30	46.67%	5.0
Timbersaw	11	22.00%	92.22	15.56	4	75.00%	1.0	7	85.71%	1.2
Mirana	10	20.00%	91.11	10.00	2	100.00%	0.5	8	75.00%	1.3
Death Prophet	46	92.00%	90.00	90.00	14	64.29%	3.5	32	43.75%	5.3
Medusa	44	88.00%	88.89	86.67	10	60.00%	2.5	34	50.00%	5.7
Terrorblade	35	70.00%	87.78	73.33	6	33.33%	1.5	29	65.52%	4.8
Weaver	30	60.00%	86.67	67.78	13	61.54%	3.3	17	52.94%	2.8
Storm Spirit	35	70.00%	85.56	84.44	18	50.00%	4.5	17	52.94%	2.8
Mars	35	70.00%	84.44	83.33	16	50.00%	4.0	19	52.63%	3.2
Gyrocopter	15	30.00%	83.33	47.78	12	58.33%	3.0	3	100.00%	0.5
Monkey King	29	58.00%	82.22	76.67	15	53.33%	3.8	14	50.00%	2.3
Shadow Shaman	13	26.00%	81.11	45.56	9	66.67%	2.3	4	50.00%	0.7
Luna	7	14.00%	80.00	11.11	3	66.67%	0.8	4	100.00%	0.7
Necrophos	13	26.00%	78.89	44.44	6	66.67%	1.5	7	57.14%	1.2
Abaddon	13	26.00%	77.78	46.67	8	62.50%	2.0	5	60.00%	0.8
Sand King	29	58.00%	76.67	88.89	20	50.00%	5.0	9	33.33%	1.5
Shadow Demon	23	46.00%	75.56	74.44	11	45.45%	2.8	12	58.33%	2.0
Dragon Knight	33	66.00%	74.44	93.33	14	50.00%	3.5	19	36.84%	3.2
Puck	24	48.00%	73.33	75.56	4	75.00%	1.0	20	40.00%	3.3
Io	37	74.00%	72.22	95.56	17	41.18%	4.3	20	45.00%	3.3
Drow Ranger	11	22.00%	71.11	41.11	5	60.00%	1.3	6	66.67%	1.0
Hoodwink	22	44.00%	70.00	77.78	18	50.00%	4.5	4	25.00%	0.7
Razor	25	50.00%	68.89	80.00	5	40.00%	1.3	20	50.00%	3.3
Chaos Knight	8	16.00%	67.78	34.44	6	66.67%	1.5	2	50.00%	0.3
Enchantress	10	20.00%	66.67	36.67	3	33.33%	0.8	7	85.71%	1.2
Pangolier	32	64.00%	65.56	98.89	14	35.71%	3.5	18	44.44%	3.0
Void Spirit	8	16.00%	64.44	23.33	3	66.67%	0.8	5	60.00%	0.8
Lifestealer	16	32.00%	63.33	65.56	3	66.67%	0.8	13	38.46%	2.2
Kunkka	27	54.00%	62.22	94.44	4	50.00%	1.0	23	34.78%	3.8
Bane	18	36.00%	61.11	82.22	13	38.46%	3.3	5	60.00%	0.8
Queen of Pain	15	30.00%	60.00	68.89	5	60.00%	1.3	10	30.00%	1.7
Pugna	13	26.00%	58.89	66.67	7	42.86%	1.8	6	50.00%	1.0
Batrider	20	40.00%	57.78	87.78	3	0.00%	0.8	17	52.94%	2.8
Leshrac	19	38.00%	56.67	91.11	7	28.57%	1.8	12	50.00%	2.0
Grimstroke	23	46.00%	55.56	96.67	14	35.71%	3.5	9	33.33%	1.5
Ember Spirit	33	66.00%	54.44	100.00	16	37.50%	4.0	17	17.65%	2.8
Legion Commander	7	14.00%	53.33	42.22	4	75.00%	1.0	3	0.00%	0.5
Undying	5	10.00%	52.22	18.89	3	66.67%	0.8	2	50.00%	0.3
Naga Siren	2	4.00%	51.11	8.89	1	100.00%	0.3	1	100.00%	0.2
Doom	11	22.00%	50.00	63.33	5	40.00%	1.3	6	50.00%	1.0
Tusk	8	16.00%	48.89	53.33	7	42.86%	1.8	1	100.00%	0.2
Anti-Mage	18	36.00%	47.78	92.22	8	25.00%	2.0	10	50.00%	1.7
Phantom Lancer	7	14.00%	46.67	22.22	0	0.00%	0.0	7	57.14%	1.2
Magnus	4	8.00%	45.56	13.33	2	50.00%	0.5	2	100.00%	0.3
Faceless Void	4	8.00%	45.56	13.33	2	50.00%	0.5	2	100.00%	0.3
Invoker	21	42.00%	43.33	97.78	4	50.00%	1.0	17	23.53%	2.8
Phantom Assassin	10	20.00%	42.22	61.11	4	25.00%	1.0	6	66.67%	1.0
Tidehunter	13	26.00%	41.11	78.89	6	50.00%	1.5	7	14.29%	1.2
Huskar	4	8.00%	40.00	21.11	3	66.67%	0.8	1	0.00%	0.2
Lone Druid	8	16.00%	38.89	57.78	4	50.00%	1.0	4	25.00%	0.7
Troll Warlord	2	4.00%	37.78	6.67	0	0.00%	0.0	2	100.00%	0.3
Juggernaut	2	4.00%	37.78	1.11	0	0.00%	0.0	2	100.00%	0.3
Wraith King	5	10.00%	35.56	35.56	3	33.33%	0.8	2	100.00%	0.3
Riki	1	2.00%	34.44	4.44	1	100.00%	0.3	0	0.00%	0.0
Windranger	1	2.00%	34.44	4.44	1	100.00%	0.3	0	0.00%	0.0
Brewmaster	11	22.00%	32.22	85.56	3	33.33%	0.8	8	25.00%	1.3
Ursa	8	16.00%	31.11	72.22	5	20.00%	1.3	3	66.67%	0.5
Rubick	5	10.00%	30.00	50.00	3	33.33%	0.8	2	50.00%	0.3
Viper	6	12.00%	28.89	58.89	3	0.00%	0.8	3	100.00%	0.5
Morphling	7	14.00%	27.78	64.44	3	33.33%	0.8	4	25.00%	0.7
Lion	2	4.00%	26.67	17.78	2	50.00%	0.5	0	0.00%	0.0
Meepo	1	2.00%	25.56	2.22	0	0.00%	0.0	1	100.00%	0.2
Dark Seer	1	2.00%	25.56	5.56	0	0.00%	0.0	1	100.00%	0.2
Broodmother	1	2.00%	25.56	7.78	0	0.00%	0.0	1	100.00%	0.2
Outworld Destroyer	5	10.00%	22.22	48.89	1	0.00%	0.3	4	50.00%	0.7
Dark Willow	3	6.00%	21.11	43.33	3	33.33%	0.8	0	0.00%	0.0
Omniknight	4	8.00%	20.00	51.11	3	33.33%	0.8	1	0.00%	0.2
Nature's Prophet	4	8.00%	18.89	60.00	4	25.00%	1.0	0	0.00%	0.0
Jakiro	2	4.00%	17.78	20.00	1	0.00%	0.3	1	100.00%	0.2
Techies	1	2.00%	16.67	32.22	1	0.00%	0.3	0	0.00%	0.0
Earth Spirit	1	2.00%	16.67	32.22	1	0.00%	0.3	0	0.00%	0.0
Oracle	1	2.00%	16.67	32.22	1	0.00%	0.3	0	0.00%	0.0
Ogre Magi	1	2.00%	16.67	32.22	1	0.00%	0.3	0	0.00%	0.0
Phoenix	1	2.00%	16.67	32.22	1	0.00%	0.3	0	0.00%	0.0
Arc Warden	1	2.00%	16.67	32.22	1	0.00%	0.3	0	0.00%	0.0
Clinkz	1	2.00%	16.67	32.22	1	0.00%	0.3	0	0.00%	0.0
Nyx Assassin	1	2.00%	8.89	16.67	0	0.00%	0.0	1	0.00%	0.2
Ancient Apparition	2	4.00%	7.78	56.67	2	0.00%	0.5	0	0.00%	0.0
Night Stalker	2	4.00%	6.67	38.89	0	0.00%	0.0	2	0.00%	0.3
Slardar	2	4.00%	6.67	38.89	0	0.00%	0.0	2	0.00%	0.3
Snapfire	2	4.00%	4.44	56.67	2	0.00%	0.5	0	0.00%	0.0
Underlord	3	6.00%	3.33	71.11	2	0.00%	0.5	1	0.00%	0.2
Bloodseeker	3	6.00%	2.22	62.22	1	0.00%	0.3	2	0.00%	0.3
Clockwerk	1	2.00%	1.11	32.22	1	0.00%	0.3	0	0.00%	0.0