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): 1 - Median hero bans (mb): 4 - Matches: 42

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

Balance rank	Winrate	Pickrate	Contest Rate
65.2	84.3	50.4	37.4

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Oracle	41	97.62%	100.00	68.60	9	66.67%	9.0	32	65.63%	8.0
Razor	36	85.71%	98.84	82.56	10	50.00%	10.0	26	57.69%	6.5
Ursa	26	61.90%	97.67	69.77	13	61.54%	13.0	13	53.85%	3.3
Outworld Destroyer	33	78.57%	96.51	80.23	9	77.78%	9.0	24	37.50%	6.0
Terrorblade	18	42.86%	95.35	54.65	9	55.56%	9.0	9	77.78%	2.3
Batrider	31	73.81%	94.19	77.91	6	66.67%	6.0	25	48.00%	6.3
Dark Seer	9	21.43%	93.02	22.09	4	75.00%	4.0	5	80.00%	1.3
Puck	24	57.14%	91.86	70.93	6	66.67%	6.0	18	50.00%	4.5
Bounty Hunter	18	42.86%	90.70	53.49	3	33.33%	3.0	15	73.33%	3.8
Morphling	32	76.19%	89.53	84.88	13	46.15%	13.0	19	57.89%	4.8
Night Stalker	8	19.05%	88.37	16.28	2	100.00%	2.0	6	66.67%	1.5
Juggernaut	14	33.33%	87.21	50.00	8	62.50%	8.0	6	66.67%	1.5
Troll Warlord	25	59.52%	86.05	74.42	7	42.86%	7.0	18	61.11%	4.5
Shadow Shaman	34	80.95%	84.88	91.86	20	50.00%	20.0	14	42.86%	3.5
Winter Wyvern	15	35.71%	83.72	56.98	10	60.00%	10.0	5	60.00%	1.3
Nyx Assassin	32	76.19%	82.56	90.70	12	58.33%	12.0	20	35.00%	5.0
Enigma	36	85.71%	81.40	97.67	9	44.44%	9.0	27	44.44%	6.8
Leshrac	20	47.62%	80.23	72.09	12	66.67%	12.0	8	12.50%	2.0
Pangolier	13	30.95%	79.07	58.14	11	63.64%	11.0	2	0.00%	0.5
Lone Druid	26	61.90%	77.91	86.05	6	66.67%	6.0	20	35.00%	5.0
Phantom Assassin	10	23.81%	76.74	46.51	8	62.50%	8.0	2	50.00%	0.5
Viper	12	28.57%	75.58	41.86	1	0.00%	1.0	11	72.73%	2.8
Centaur Warrunner	5	11.90%	74.42	13.95	4	75.00%	4.0	1	100.00%	0.3
Necrophos	5	11.90%	74.42	13.95	4	75.00%	4.0	1	100.00%	0.3
Tiny	8	19.05%	72.09	37.21	6	66.67%	6.0	2	50.00%	0.5
Bane	10	23.81%	70.93	48.84	7	57.14%	7.0	3	66.67%	0.8
Vengeful Spirit	27	64.29%	69.77	95.35	21	38.10%	21.0	6	66.67%	1.5
Abaddon	6	14.29%	68.60	27.91	4	75.00%	4.0	2	50.00%	0.5
Nature's Prophet	20	47.62%	67.44	83.72	7	28.57%	7.0	13	61.54%	3.3
Monkey King	12	28.57%	66.28	62.79	5	60.00%	5.0	7	42.86%	1.8
Ancient Apparition	4	9.52%	65.12	15.12	4	75.00%	4.0	0	0.00%	0.0
Lifestealer	25	59.52%	63.95	96.51	11	45.45%	11.0	14	28.57%	3.5
Lina	6	14.29%	62.79	29.07	3	66.67%	3.0	3	66.67%	0.8
Spectre	2	4.76%	61.63	8.14	2	100.00%	2.0	0	0.00%	0.0
Omniknight	2	4.76%	61.63	8.14	2	100.00%	2.0	0	0.00%	0.0
Pugna	10	23.81%	59.30	51.16	3	33.33%	3.0	7	71.43%	1.8
Lion	7	16.67%	58.14	40.70	7	57.14%	7.0	0	0.00%	0.0
Lycan	5	11.90%	56.98	19.77	2	50.00%	2.0	3	100.00%	0.8
Doom	16	38.10%	55.81	76.74	7	42.86%	7.0	9	44.44%	2.3
Timbersaw	11	26.19%	54.65	63.95	3	33.33%	3.0	8	62.50%	2.0
Ember Spirit	19	45.24%	53.49	93.02	10	40.00%	10.0	9	33.33%	2.3
Magnus	17	40.48%	52.33	87.21	6	50.00%	6.0	11	27.27%	2.8
Kunkka	14	33.33%	51.16	79.07	6	33.33%	6.0	8	50.00%	2.0
Death Prophet	4	9.52%	50.00	9.30	0	0.00%	0.0	4	75.00%	1.0
Rubick	7	16.67%	48.84	59.30	6	50.00%	6.0	1	0.00%	0.3
Clockwerk	3	7.14%	47.67	18.60	3	66.67%	3.0	0	0.00%	0.0
Earthshaker	3	7.14%	47.67	18.60	3	66.67%	3.0	0	0.00%	0.0
Beastmaster	5	11.90%	45.35	31.40	2	50.00%	2.0	3	66.67%	0.8
Earth Spirit	21	50.00%	44.19	98.84	11	27.27%	11.0	10	30.00%	2.5
Sven	4	9.52%	43.02	30.23	3	66.67%	3.0	1	0.00%	0.3
Disruptor	4	9.52%	41.86	38.37	4	50.00%	4.0	0	0.00%	0.0
Tusk	3	7.14%	40.70	20.93	2	50.00%	2.0	1	100.00%	0.3
Invoker	1	2.38%	39.53	3.49	1	100.00%	1.0	0	0.00%	0.0
Storm Spirit	1	2.38%	39.53	3.49	1	100.00%	1.0	0	0.00%	0.0
Luna	1	2.38%	39.53	3.49	1	100.00%	1.0	0	0.00%	0.0
Anti-Mage	6	14.29%	36.05	60.47	4	25.00%	4.0	2	100.00%	0.5
Jakiro	5	11.90%	34.88	55.81	5	40.00%	5.0	0	0.00%	0.0
Templar Assassin	8	19.05%	33.72	73.26	4	50.00%	4.0	4	0.00%	1.0
Legion Commander	5	11.90%	32.56	45.35	2	50.00%	2.0	3	33.33%	0.8
Slardar	5	11.90%	32.56	45.35	2	50.00%	2.0	3	33.33%	0.8
Undying	2	4.76%	30.23	10.47	1	100.00%	1.0	1	0.00%	0.3
Chen	5	11.90%	29.07	52.33	3	33.33%	3.0	2	50.00%	0.5
Brewmaster	17	40.48%	27.91	100.00	9	11.11%	9.0	8	37.50%	2.0
Queen of Pain	7	16.67%	26.74	75.58	4	25.00%	4.0	3	33.33%	0.8
Lich	2	4.76%	25.58	26.74	2	50.00%	2.0	0	0.00%	0.0
Drow Ranger	2	4.76%	25.58	26.74	2	50.00%	2.0	0	0.00%	0.0
Phoenix	2	4.76%	25.58	26.74	2	50.00%	2.0	0	0.00%	0.0
Dazzle	2	4.76%	25.58	26.74	2	50.00%	2.0	0	0.00%	0.0
Alchemist	1	2.38%	20.93	5.81	0	0.00%	0.0	1	100.00%	0.3
Tinker	1	2.38%	20.93	5.81	0	0.00%	0.0	1	100.00%	0.3
Shadow Fiend	5	11.90%	18.60	66.28	2	0.00%	2.0	3	66.67%	0.8
Sand King	3	7.14%	17.44	47.67	3	33.33%	3.0	0	0.00%	0.0
Dark Willow	4	9.52%	16.28	61.63	3	33.33%	3.0	1	0.00%	0.3
Phantom Lancer	8	19.05%	15.12	88.37	2	0.00%	2.0	6	33.33%	1.5
Weaver	2	4.76%	13.95	11.63	0	0.00%	0.0	2	50.00%	0.5
Tidehunter	7	16.67%	12.79	89.53	4	0.00%	4.0	3	66.67%	0.8
Dragon Knight	7	16.67%	11.63	94.19	5	20.00%	5.0	2	0.00%	0.5
Venomancer	3	7.14%	10.47	43.02	1	0.00%	1.0	2	50.00%	0.5
Pudge	1	2.38%	9.30	36.05	1	0.00%	1.0	0	0.00%	0.0
Shadow Demon	3	7.14%	8.14	81.40	3	0.00%	3.0	0	0.00%	0.0
Naga Siren	2	4.76%	6.98	67.44	2	0.00%	2.0	0	0.00%	0.0
Faceless Void	1	2.38%	5.81	36.05	1	0.00%	1.0	0	0.00%	0.0
Arc Warden	1	2.38%	5.81	36.05	1	0.00%	1.0	0	0.00%	0.0
Medusa	2	4.76%	3.49	39.53	0	0.00%	0.0	2	0.00%	0.5
Meepo	3	7.14%	2.33	65.12	0	0.00%	0.0	3	0.00%	0.8
Mirana	1	2.38%	1.16	36.05	1	0.00%	1.0	0	0.00%	0.0