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): 8 - Matches: 55

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

Balance rank	Winrate	Pickrate	Contest Rate
57.3	77.6	40.8	29.2

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Ancient Apparition	49	89.09%	100.00	64.77	10	70.00%	2.5	39	58.97%	4.9
Luna	35	63.64%	98.86	48.86	19	68.42%	4.8	16	62.50%	2.0
Pangolier	17	30.91%	97.73	25.00	8	87.50%	2.0	9	55.56%	1.1
Dragon Knight	40	72.73%	96.59	63.64	19	63.16%	4.8	21	57.14%	2.6
Lina	39	70.91%	95.45	65.91	26	61.54%	6.5	13	53.85%	1.6
Razor	13	23.64%	94.32	14.77	3	100.00%	0.8	10	70.00%	1.3
Dark Willow	15	27.27%	93.18	35.23	12	75.00%	3.0	3	33.33%	0.4
Medusa	37	67.27%	92.05	73.86	8	75.00%	2.0	29	44.83%	3.6
Tidehunter	26	47.27%	90.91	52.27	5	80.00%	1.3	21	52.38%	2.6
Mirana	14	25.45%	89.77	34.09	9	77.78%	2.3	5	40.00%	0.6
Invoker	37	67.27%	88.64	80.68	16	62.50%	4.0	21	38.10%	2.6
Nyx Assassin	35	63.64%	87.50	79.55	13	53.85%	3.3	22	50.00%	2.8
Axe	40	72.73%	86.36	89.77	23	43.48%	5.8	17	64.71%	2.1
Hoodwink	40	72.73%	85.23	92.05	32	46.88%	8.0	8	62.50%	1.0
Mars	33	60.00%	84.09	78.41	10	50.00%	2.5	23	52.17%	2.9
Winter Wyvern	34	61.82%	82.95	81.82	18	44.44%	4.5	16	62.50%	2.0
Shadow Demon	20	36.36%	81.82	51.14	9	66.67%	2.3	11	45.45%	1.4
Broodmother	45	81.82%	80.68	94.32	7	42.86%	1.8	38	47.37%	4.8
Windranger	6	10.91%	79.55	11.36	5	80.00%	1.3	1	100.00%	0.1
Enigma	5	9.09%	78.41	7.95	0	0.00%	0.0	5	100.00%	0.6
Enchantress	32	58.18%	77.27	82.95	19	52.63%	4.8	13	38.46%	1.6
Lifestealer	22	40.00%	76.14	56.82	7	57.14%	1.8	15	53.33%	1.9
Magnus	24	43.64%	75.00	70.45	9	55.56%	2.3	15	46.67%	1.9
Viper	32	58.18%	73.86	85.23	4	50.00%	1.0	28	46.43%	3.5
Spectre	31	56.36%	72.73	87.50	8	37.50%	2.0	23	52.17%	2.9
Terrorblade	31	56.36%	71.59	90.91	13	46.15%	3.3	18	44.44%	2.3
Doom	19	34.55%	70.45	60.23	6	50.00%	1.5	13	53.85%	1.6
Phoenix	26	47.27%	69.32	84.09	18	38.89%	4.5	8	75.00%	1.0
Timbersaw	41	74.55%	68.18	97.73	14	35.71%	3.5	27	44.44%	3.4
Techies	11	20.00%	67.05	39.77	2	50.00%	0.5	9	66.67%	1.1
Drow Ranger	18	32.73%	65.91	61.36	6	33.33%	1.5	12	66.67%	1.5
Puck	41	74.55%	64.77	98.86	12	33.33%	3.0	29	41.38%	3.6
Morphling	20	36.36%	63.64	68.18	1	0.00%	0.3	19	52.63%	2.4
Phantom Lancer	25	45.45%	62.50	88.64	8	50.00%	2.0	17	35.29%	2.1
Ursa	22	40.00%	61.36	77.27	5	40.00%	1.3	17	47.06%	2.1
Bloodseeker	5	9.09%	60.23	12.50	3	66.67%	0.8	2	100.00%	0.3
Treant Protector	8	14.55%	59.09	32.95	5	60.00%	1.3	3	66.67%	0.4
Witch Doctor	4	7.27%	57.95	9.09	2	100.00%	0.5	2	50.00%	0.3
Dark Seer	10	18.18%	56.82	40.91	2	100.00%	0.5	8	37.50%	1.0
Templar Assassin	31	56.36%	55.68	96.59	12	33.33%	3.0	19	42.11%	2.4
Clockwerk	11	20.00%	54.55	46.59	4	50.00%	1.0	7	57.14%	0.9
Tiny	6	10.91%	53.41	19.32	3	66.67%	0.8	3	66.67%	0.4
Earth Spirit	8	14.55%	52.27	38.64	4	50.00%	1.0	4	75.00%	0.5
Snapfire	2	3.64%	51.14	5.68	2	100.00%	0.5	0	0.00%	0.0
Faceless Void	26	47.27%	50.00	95.45	7	42.86%	1.8	19	31.58%	2.4
Kunkka	9	16.36%	48.86	44.32	4	50.00%	1.0	5	60.00%	0.6
Wraith King	12	21.82%	47.73	53.41	3	33.33%	0.8	9	55.56%	1.1
Death Prophet	18	32.73%	46.59	86.36	8	37.50%	2.0	10	40.00%	1.3
Phantom Assassin	3	5.45%	45.45	10.23	2	100.00%	0.5	1	0.00%	0.1
Lion	30	54.55%	44.32	100.00	27	29.63%	6.8	3	33.33%	0.4
Leshrac	13	23.64%	43.18	67.05	6	50.00%	1.5	7	28.57%	0.9
Sand King	12	21.82%	42.05	57.95	4	25.00%	1.0	8	62.50%	1.0
Batrider	14	25.45%	40.91	76.14	5	20.00%	1.3	9	55.56%	1.1
Gyrocopter	6	10.91%	39.77	43.18	4	50.00%	1.0	2	50.00%	0.3
Elder Titan	9	16.36%	38.64	59.09	6	50.00%	1.5	3	0.00%	0.4
Disruptor	4	7.27%	37.50	23.86	3	66.67%	0.8	1	0.00%	0.1
Abaddon	8	14.55%	36.36	55.68	7	42.86%	1.8	1	0.00%	0.1
Juggernaut	8	14.55%	35.23	50.00	4	25.00%	1.0	4	75.00%	0.5
Monkey King	4	7.27%	34.09	17.05	1	100.00%	0.3	3	33.33%	0.4
Undying	3	5.45%	32.95	13.64	2	50.00%	0.5	1	100.00%	0.1
Rubick	1	1.82%	31.82	1.14	1	100.00%	0.3	0	0.00%	0.0
Keeper of the Light	1	1.82%	31.82	4.55	1	100.00%	0.3	0	0.00%	0.0
Storm Spirit	11	20.00%	29.55	71.59	1	0.00%	0.3	10	40.00%	1.3
Void Spirit	8	14.55%	28.41	62.50	4	25.00%	1.0	4	50.00%	0.5
Ember Spirit	5	9.09%	27.27	42.05	2	50.00%	0.5	3	33.33%	0.4
Underlord	5	9.09%	26.14	45.45	3	33.33%	0.8	2	50.00%	0.3
Tusk	2	3.64%	25.00	18.18	2	50.00%	0.5	0	0.00%	0.0
Riki	1	1.82%	23.86	6.82	0	0.00%	0.0	1	100.00%	0.1
Lycan	1	1.82%	23.86	3.41	0	0.00%	0.0	1	100.00%	0.1
Legion Commander	1	1.82%	23.86	3.41	0	0.00%	0.0	1	100.00%	0.1
Zeus	3	5.45%	20.45	31.82	2	50.00%	0.5	1	0.00%	0.1
Grimstroke	7	12.73%	19.32	72.73	2	0.00%	0.5	5	40.00%	0.6
Pugna	2	3.64%	18.18	22.73	1	0.00%	0.3	1	100.00%	0.1
Beastmaster	2	3.64%	18.18	22.73	1	0.00%	0.3	1	100.00%	0.1
Night Stalker	2	3.64%	18.18	22.73	1	0.00%	0.3	1	100.00%	0.1
Centaur Warrunner	4	7.27%	14.77	47.73	1	0.00%	0.3	3	33.33%	0.4
Warlock	4	7.27%	13.64	54.55	2	0.00%	0.5	2	50.00%	0.3
Naga Siren	5	9.09%	12.50	93.18	2	0.00%	0.5	3	0.00%	0.4
Troll Warlord	2	3.64%	11.36	37.50	0	0.00%	0.0	2	0.00%	0.3
Nature's Prophet	3	5.45%	10.23	69.32	2	0.00%	0.5	1	0.00%	0.1
Sven	2	3.64%	9.09	37.50	0	0.00%	0.0	2	0.00%	0.3
Io	1	1.82%	7.95	30.68	1	0.00%	0.3	0	0.00%	0.0
Anti-Mage	1	1.82%	6.82	15.91	0	0.00%	0.0	1	0.00%	0.1
Pudge	1	1.82%	5.68	30.68	1	0.00%	0.3	0	0.00%	0.0
Oracle	3	5.45%	4.55	75.00	3	0.00%	0.8	0	0.00%	0.0
Crystal Maiden	1	1.82%	3.41	30.68	1	0.00%	0.3	0	0.00%	0.0
Slardar	1	1.82%	3.41	30.68	1	0.00%	0.3	0	0.00%	0.0
Weaver	1	1.82%	3.41	30.68	1	0.00%	0.3	0	0.00%	0.0