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: 52

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

Balance rank	Winrate	Pickrate	Contest Rate
56.9	69.2	48.8	36.4

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Luna	24	46.15%	100.00	43.16	8	75.00%	2.0	16	68.75%	2.7
Weaver	33	63.46%	98.95	58.95	12	83.33%	3.0	21	42.86%	3.5
Kunkka	19	36.54%	97.89	36.84	7	71.43%	1.8	12	75.00%	2.0
Dark Seer	8	15.38%	96.84	10.53	3	100.00%	0.8	5	80.00%	0.8
Mars	46	88.46%	95.79	83.16	29	51.72%	7.3	17	58.82%	2.8
Io	12	23.08%	94.74	27.37	5	80.00%	1.3	7	71.43%	1.2
Wraith King	24	46.15%	93.68	54.74	8	87.50%	2.0	16	37.50%	2.7
Puck	33	63.46%	92.63	71.58	8	50.00%	2.0	25	60.00%	4.2
Lion	27	51.92%	91.58	64.21	21	61.90%	5.3	6	33.33%	1.0
Lycan	15	28.85%	90.53	32.63	2	100.00%	0.5	13	61.54%	2.2
Beastmaster	9	17.31%	89.47	17.89	2	100.00%	0.5	7	71.43%	1.2
Legion Commander	10	19.23%	88.42	26.32	6	66.67%	1.5	4	100.00%	0.7
Lina	41	78.85%	87.37	85.26	11	45.45%	2.8	30	53.33%	5.0
Medusa	18	34.62%	86.32	45.26	2	100.00%	0.5	16	56.25%	2.7
Grimstroke	22	42.31%	85.26	60.00	12	58.33%	3.0	10	60.00%	1.7
Dawnbreaker	32	61.54%	84.21	77.89	12	50.00%	3.0	20	55.00%	3.3
Phantom Lancer	18	34.62%	83.16	49.47	3	0.00%	0.8	15	86.67%	2.5
Anti-Mage	4	7.69%	82.11	4.21	2	100.00%	0.5	2	100.00%	0.3
Doom	26	50.00%	81.05	68.42	11	63.64%	2.8	15	40.00%	2.5
Magnus	33	63.46%	80.00	82.11	10	40.00%	2.5	23	56.52%	3.8
Faceless Void	21	40.38%	78.95	61.05	6	50.00%	1.5	15	60.00%	2.5
Silencer	13	25.00%	77.89	41.05	4	100.00%	1.0	9	33.33%	1.5
Pangolier	14	26.92%	76.84	52.63	11	63.64%	2.8	3	33.33%	0.5
Templar Assassin	28	53.85%	75.79	78.95	8	62.50%	2.0	20	40.00%	3.3
Jakiro	3	5.77%	74.74	2.11	3	100.00%	0.8	0	0.00%	0.0
Ember Spirit	40	76.92%	73.68	95.79	14	50.00%	3.5	26	38.46%	4.3
Invoker	29	55.77%	72.63	80.00	4	75.00%	1.0	25	40.00%	4.2
Terrorblade	25	48.08%	71.58	74.74	7	57.14%	1.8	18	44.44%	3.0
Morphling	23	44.23%	70.53	72.63	5	20.00%	1.3	18	66.67%	3.0
Monkey King	47	90.38%	69.47	98.95	15	40.00%	3.8	32	37.50%	5.3
Slardar	3	5.77%	68.42	3.16	2	100.00%	0.5	1	100.00%	0.2
Juggernaut	3	5.77%	68.42	6.32	2	100.00%	0.5	1	100.00%	0.2
Razor	3	5.77%	68.42	6.32	2	100.00%	0.5	1	100.00%	0.2
Tidehunter	38	73.08%	65.26	96.84	13	38.46%	3.3	25	44.00%	4.2
Bloodseeker	13	25.00%	64.21	44.21	2	50.00%	0.5	11	63.64%	1.8
Tiny	30	57.69%	63.16	88.42	7	28.57%	1.8	23	52.17%	3.8
Ogre Magi	7	13.46%	62.11	28.42	5	80.00%	1.3	2	0.00%	0.3
Batrider	20	38.46%	61.05	70.53	3	33.33%	0.8	17	52.94%	2.8
Queen of Pain	13	25.00%	60.00	57.89	8	50.00%	2.0	5	60.00%	0.8
Void Spirit	25	48.08%	58.95	89.47	16	43.75%	4.0	9	33.33%	1.5
Storm Spirit	21	40.38%	57.89	81.05	11	54.55%	2.8	10	20.00%	1.7
Disruptor	4	7.69%	56.84	11.58	2	100.00%	0.5	2	50.00%	0.3
Drow Ranger	4	7.69%	55.79	16.84	4	75.00%	1.0	0	0.00%	0.0
Earth Spirit	4	7.69%	55.79	16.84	4	75.00%	1.0	0	0.00%	0.0
Death Prophet	11	21.15%	53.68	53.68	6	66.67%	1.5	5	20.00%	0.8
Bane	24	46.15%	52.63	92.63	14	42.86%	3.5	10	30.00%	1.7
Elder Titan	20	38.46%	51.58	84.21	10	40.00%	2.5	10	40.00%	1.7
Snapfire	32	61.54%	50.53	97.89	25	36.00%	6.3	7	14.29%	1.2
Lifestealer	23	44.23%	49.47	93.68	9	22.22%	2.3	14	57.14%	2.3
Sven	4	7.69%	48.42	13.68	1	100.00%	0.3	3	66.67%	0.5
Enchantress	12	23.08%	47.37	63.16	6	33.33%	1.5	6	66.67%	1.0
Naga Siren	3	5.77%	46.32	12.63	2	100.00%	0.5	1	0.00%	0.2
Rubick	22	42.31%	45.26	94.74	10	20.00%	2.5	12	58.33%	2.0
Ursa	20	38.46%	44.21	90.53	5	40.00%	1.3	15	33.33%	2.5
Nyx Assassin	2	3.85%	43.16	1.05	1	100.00%	0.3	1	100.00%	0.2
Nature's Prophet	8	15.38%	42.11	47.37	2	50.00%	0.5	6	50.00%	1.0
Phantom Assassin	8	15.38%	42.11	47.37	2	50.00%	0.5	6	50.00%	1.0
Necrophos	5	9.62%	40.00	31.58	4	50.00%	1.0	1	100.00%	0.2
Undying	14	26.92%	38.95	87.37	13	30.77%	3.3	1	100.00%	0.2
Winter Wyvern	9	17.31%	37.89	62.11	6	33.33%	1.5	3	66.67%	0.5
Tinker	8	15.38%	36.84	55.79	4	25.00%	1.0	4	75.00%	0.7
Leshrac	10	19.23%	35.79	65.26	3	33.33%	0.8	7	42.86%	1.2
Ancient Apparition	4	7.69%	34.74	23.16	1	0.00%	0.3	3	100.00%	0.5
Dark Willow	4	7.69%	33.68	34.74	4	50.00%	1.0	0	0.00%	0.0
Tusk	4	7.69%	33.68	34.74	4	50.00%	1.0	0	0.00%	0.0
Sand King	6	11.54%	31.58	48.42	3	33.33%	0.8	3	66.67%	0.5
Spirit Breaker	3	5.77%	30.53	18.95	2	50.00%	0.5	1	100.00%	0.2
Axe	1	1.92%	29.47	9.47	1	100.00%	0.3	0	0.00%	0.0
Windranger	1	1.92%	29.47	9.47	1	100.00%	0.3	0	0.00%	0.0
Timbersaw	4	7.69%	27.37	29.47	2	50.00%	0.5	2	50.00%	0.3
Spectre	14	26.92%	26.32	91.58	1	0.00%	0.3	13	30.77%	2.2
Viper	5	9.62%	25.26	42.11	2	50.00%	0.5	3	33.33%	0.5
Oracle	4	7.69%	24.21	40.00	3	33.33%	0.8	1	100.00%	0.2
Troll Warlord	5	9.62%	23.16	51.58	3	33.33%	0.8	2	50.00%	0.3
Mirana	7	13.46%	22.11	73.68	4	25.00%	1.0	3	33.33%	0.5
Hoodwink	2	3.85%	21.05	25.26	2	50.00%	0.5	0	0.00%	0.0
Treant Protector	2	3.85%	21.05	25.26	2	50.00%	0.5	0	0.00%	0.0
Shadow Demon	4	7.69%	18.95	35.79	1	0.00%	0.3	3	66.67%	0.5
Huskar	1	1.92%	17.89	7.37	0	0.00%	0.0	1	100.00%	0.2
Slark	8	15.38%	16.84	69.47	0	0.00%	0.0	8	25.00%	1.3
Clockwerk	5	9.62%	15.79	67.37	4	25.00%	1.0	1	0.00%	0.2
Phoenix	5	9.62%	15.79	67.37	4	25.00%	1.0	1	0.00%	0.2
Shadow Fiend	2	3.85%	13.68	14.74	0	0.00%	0.0	2	50.00%	0.3
Night Stalker	6	11.54%	12.63	76.84	4	25.00%	1.0	2	0.00%	0.3
Earthshaker	7	13.46%	11.58	86.32	5	0.00%	1.3	2	100.00%	0.3
Gyrocopter	9	17.31%	10.53	100.00	5	0.00%	1.3	4	25.00%	0.7
Brewmaster	2	3.85%	9.47	38.95	0	0.00%	0.0	2	0.00%	0.3
Shadow Shaman	2	3.85%	8.42	56.84	2	0.00%	0.5	0	0.00%	0.0
Underlord	3	5.77%	7.37	75.79	3	0.00%	0.8	0	0.00%	0.0
Abaddon	2	3.85%	6.32	50.53	1	0.00%	0.3	1	0.00%	0.2
Skywrath Mage	2	3.85%	5.26	38.95	0	0.00%	0.0	2	0.00%	0.3
Lich	1	1.92%	4.21	30.53	1	0.00%	0.3	0	0.00%	0.0
Zeus	1	1.92%	3.16	22.11	0	0.00%	0.0	1	0.00%	0.2
Riki	1	1.92%	3.16	22.11	0	0.00%	0.0	1	0.00%	0.2
Meepo	1	1.92%	3.16	22.11	0	0.00%	0.0	1	0.00%	0.2