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): 5 - Median hero bans (mb): 7 - Matches: 45

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

Balance rank	Winrate	Pickrate	Contest Rate
56.8	79.7	40.0	21.7

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Oracle	22	48.89%	100.00	25.30	12	91.67%	2.4	10	50.00%	1.4
Terrorblade	39	86.67%	98.80	73.49	13	69.23%	2.6	26	50.00%	3.7
Puck	32	71.11%	97.59	66.27	7	57.14%	1.4	25	60.00%	3.6
Viper	33	73.33%	96.39	71.08	10	60.00%	2.0	23	56.52%	3.3
Death Prophet	22	48.89%	95.18	49.40	4	75.00%	0.8	18	61.11%	2.6
Mars	34	75.56%	93.98	74.70	10	70.00%	2.0	24	45.83%	3.4
Kunkka	25	55.56%	92.77	59.04	9	77.78%	1.8	16	43.75%	2.3
Mirana	19	42.22%	91.57	51.81	16	62.50%	3.2	3	66.67%	0.4
Timbersaw	42	93.33%	90.36	85.54	5	60.00%	1.0	37	48.65%	5.3
Morphling	11	24.44%	89.16	19.28	2	100.00%	0.4	9	66.67%	1.3
Templar Assassin	17	37.78%	87.95	43.37	6	66.67%	1.2	11	63.64%	1.6
Medusa	39	86.67%	86.75	84.34	13	53.85%	2.6	26	46.15%	3.7
Spectre	16	35.56%	85.54	45.78	9	66.67%	1.8	7	57.14%	1.0
Leshrac	27	60.00%	84.34	67.47	7	71.43%	1.4	20	45.00%	2.9
Hoodwink	29	64.44%	83.13	77.11	19	63.16%	3.8	10	20.00%	1.4
Invoker	32	71.11%	81.93	81.93	8	50.00%	1.6	24	50.00%	3.4
Broodmother	15	33.33%	80.72	42.17	4	50.00%	0.8	11	72.73%	1.6
Storm Spirit	11	24.44%	79.52	30.12	4	50.00%	0.8	7	85.71%	1.0
Nyx Assassin	41	91.11%	78.31	96.39	14	50.00%	2.8	27	37.04%	3.9
Faceless Void	15	33.33%	77.11	48.19	5	60.00%	1.0	10	60.00%	1.4
Phantom Lancer	17	37.78%	75.90	55.42	2	50.00%	0.4	15	60.00%	2.1
Bristleback	17	37.78%	74.70	57.83	6	66.67%	1.2	11	45.45%	1.6
Ember Spirit	23	51.11%	73.49	75.90	11	36.36%	2.2	12	75.00%	1.7
Lion	10	22.22%	72.29	32.53	9	66.67%	1.8	1	0.00%	0.1
Venomancer	12	26.67%	71.08	36.14	4	75.00%	0.8	8	50.00%	1.1
Sand King	19	42.22%	69.88	65.06	6	66.67%	1.2	13	38.46%	1.9
Tidehunter	20	44.44%	68.67	72.29	8	62.50%	1.6	12	33.33%	1.7
Tiny	22	48.89%	67.47	79.52	12	41.67%	2.4	10	60.00%	1.4
Magnus	4	8.89%	66.27	4.82	3	100.00%	0.6	1	0.00%	0.1
Dark Seer	29	64.44%	65.06	90.36	11	36.36%	2.2	18	50.00%	2.6
Enchantress	11	24.44%	63.86	39.76	4	75.00%	0.8	7	42.86%	1.0
Ancient Apparition	28	62.22%	62.65	92.77	13	30.77%	2.6	15	60.00%	2.1
Gyrocopter	16	35.56%	61.45	69.88	11	45.45%	2.2	5	60.00%	0.7
Sven	8	17.78%	60.24	31.33	5	60.00%	1.0	3	66.67%	0.4
Clockwerk	10	22.22%	59.04	46.99	6	66.67%	1.2	4	25.00%	0.6
Centaur Warrunner	13	28.89%	57.83	60.24	7	42.86%	1.4	6	66.67%	0.9
Ursa	15	33.33%	56.63	61.45	1	100.00%	0.2	14	42.86%	2.0
Dragon Knight	25	55.56%	55.42	95.18	15	40.00%	3.0	10	30.00%	1.4
Abaddon	21	46.67%	54.22	91.57	11	36.36%	2.2	10	40.00%	1.4
Bloodseeker	6	13.33%	53.01	24.10	2	100.00%	0.4	4	25.00%	0.6
Winter Wyvern	14	31.11%	51.81	78.31	8	25.00%	1.6	6	83.33%	0.9
Dark Willow	11	24.44%	50.60	63.86	7	42.86%	1.4	4	50.00%	0.6
Elder Titan	5	11.11%	49.40	20.48	3	66.67%	0.6	2	50.00%	0.3
Anti-Mage	5	11.11%	48.19	13.25	1	100.00%	0.2	4	50.00%	0.6
Void Spirit	17	37.78%	46.99	83.13	8	25.00%	1.6	9	55.56%	1.3
Earth Spirit	4	8.89%	45.78	12.05	2	50.00%	0.4	2	100.00%	0.3
Lina	7	15.56%	44.58	40.96	3	33.33%	0.6	4	75.00%	0.6
Troll Warlord	3	6.67%	43.37	10.84	3	66.67%	0.6	0	0.00%	0.0
Batrider	16	35.56%	42.17	89.16	5	60.00%	1.0	11	9.09%	1.6
Axe	16	35.56%	40.96	93.98	10	20.00%	2.0	6	66.67%	0.9
Phoenix	11	24.44%	39.76	80.72	9	33.33%	1.8	2	50.00%	0.3
Naga Siren	8	17.78%	38.55	50.60	1	0.00%	0.2	7	57.14%	1.0
Doom	14	31.11%	37.35	86.75	5	40.00%	1.0	9	22.22%	1.3
Queen of Pain	1	2.22%	36.14	3.61	1	100.00%	0.2	0	0.00%	0.0
Crystal Maiden	1	2.22%	36.14	3.61	1	100.00%	0.2	0	0.00%	0.0
Beastmaster	1	2.22%	36.14	3.61	1	100.00%	0.2	0	0.00%	0.0
Wraith King	7	15.56%	32.53	62.65	4	25.00%	0.8	3	66.67%	0.4
Chaos Knight	3	6.67%	31.33	9.64	0	0.00%	0.0	3	66.67%	0.4
Razor	3	6.67%	31.33	9.64	0	0.00%	0.0	3	66.67%	0.4
Pangolier	5	11.11%	28.92	37.35	2	0.00%	0.4	3	100.00%	0.4
Brewmaster	2	4.44%	27.71	7.23	1	100.00%	0.2	1	0.00%	0.1
Slark	2	4.44%	27.71	7.23	1	100.00%	0.2	1	0.00%	0.1
Disruptor	2	4.44%	25.30	18.07	2	50.00%	0.4	0	0.00%	0.0
Slardar	2	4.44%	25.30	18.07	2	50.00%	0.4	0	0.00%	0.0
Luna	16	35.56%	22.89	98.80	9	11.11%	1.8	7	28.57%	1.0
Rubick	3	6.67%	21.69	28.92	2	50.00%	0.4	1	0.00%	0.1
Juggernaut	4	8.89%	20.48	44.58	2	0.00%	0.4	2	100.00%	0.3
Shadow Shaman	3	6.67%	19.28	38.55	3	33.33%	0.6	0	0.00%	0.0
Witch Doctor	4	8.89%	18.07	54.22	3	33.33%	0.6	1	0.00%	0.1
Treant Protector	4	8.89%	18.07	54.22	3	33.33%	0.6	1	0.00%	0.1
Arc Warden	2	4.44%	15.66	22.89	1	0.00%	0.2	1	100.00%	0.1
Enigma	2	4.44%	15.66	22.89	1	0.00%	0.2	1	100.00%	0.1
Monkey King	3	6.67%	13.25	34.94	1	0.00%	0.2	2	50.00%	0.3
Shadow Demon	3	6.67%	13.25	34.94	1	0.00%	0.2	2	50.00%	0.3
Lifestealer	4	8.89%	10.84	56.63	1	0.00%	0.2	3	33.33%	0.4
Undying	4	8.89%	9.64	68.67	3	0.00%	0.6	1	100.00%	0.1
Drow Ranger	1	2.22%	8.43	15.66	0	0.00%	0.0	1	0.00%	0.1
Grimstroke	4	8.89%	7.23	87.95	3	0.00%	0.6	1	0.00%	0.1
Snapfire	6	13.33%	6.02	97.59	5	0.00%	1.0	1	0.00%	0.1
Tusk	7	15.56%	4.82	100.00	6	0.00%	1.2	1	0.00%	0.1
Nature's Prophet	1	2.22%	3.61	27.71	1	0.00%	0.2	0	0.00%	0.0
Night Stalker	1	2.22%	3.61	27.71	1	0.00%	0.2	0	0.00%	0.0
Legion Commander	1	2.22%	1.20	15.66	0	0.00%	0.0	1	0.00%	0.1