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): 3 - Median hero bans (mb): 7 - Matches: 40

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

Balance rank	Winrate	Pickrate	Contest Rate
58.5	84.2	33.6	31.1

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Alchemist	14	35.00%	100.00	28.09	8	87.50%	2.7	6	66.67%	0.9
Viper	27	67.50%	98.88	61.80	7	71.43%	2.3	20	60.00%	2.9
Beastmaster	21	52.50%	97.75	51.69	5	80.00%	1.7	16	62.50%	2.3
Timbersaw	28	70.00%	96.63	67.42	8	62.50%	2.7	20	60.00%	2.9
Winter Wyvern	33	82.50%	95.51	77.53	20	60.00%	6.7	13	46.15%	1.9
Puck	36	90.00%	94.38	83.15	19	52.63%	6.3	17	58.82%	2.4
Kunkka	13	32.50%	93.26	32.58	3	100.00%	1.0	10	60.00%	1.4
Razor	34	85.00%	92.13	79.78	13	69.23%	4.3	21	38.10%	3.0
Tiny	39	97.50%	91.01	88.76	20	50.00%	6.7	19	52.63%	2.7
Zeus	38	95.00%	89.89	92.13	21	47.62%	7.0	17	52.94%	2.4
Nature's Prophet	23	57.50%	88.76	69.66	12	41.67%	4.0	11	81.82%	1.6
Bristleback	26	65.00%	87.64	76.40	6	50.00%	2.0	20	55.00%	2.9
Nyx Assassin	14	35.00%	86.52	55.06	7	71.43%	2.3	7	42.86%	1.0
Juggernaut	13	32.50%	85.39	50.56	6	66.67%	2.0	7	57.14%	1.0
Faceless Void	19	47.50%	84.27	65.17	4	50.00%	1.3	15	60.00%	2.1
Morphling	6	15.00%	83.15	15.73	1	100.00%	0.3	5	80.00%	0.7
Death Prophet	22	55.00%	82.02	74.16	11	36.36%	3.7	11	81.82%	1.6
Warlock	17	42.50%	80.90	64.04	6	50.00%	2.0	11	63.64%	1.6
Dazzle	24	60.00%	79.78	78.65	14	57.14%	4.7	10	30.00%	1.4
Tusk	9	22.50%	78.65	43.82	6	66.67%	2.0	3	66.67%	0.4
Marci	36	90.00%	77.53	98.88	9	44.44%	3.0	27	40.74%	3.9
Dawnbreaker	33	82.50%	76.40	97.75	12	41.67%	4.0	21	42.86%	3.0
Clockwerk	22	55.00%	75.28	82.02	14	42.86%	4.7	8	62.50%	1.1
Bloodseeker	24	60.00%	74.16	87.64	6	33.33%	2.0	18	50.00%	2.6
Templar Assassin	26	65.00%	73.03	94.38	5	40.00%	1.7	21	42.86%	3.0
Monkey King	11	27.50%	71.91	52.81	3	33.33%	1.0	8	75.00%	1.1
Phoenix	12	30.00%	70.79	60.67	5	60.00%	1.7	7	42.86%	1.0
Sven	2	5.00%	69.66	2.25	2	100.00%	0.7	0	0.00%	0.0
Earth Spirit	4	10.00%	68.54	20.22	3	66.67%	1.0	1	100.00%	0.1
Enigma	22	55.00%	67.42	95.51	8	37.50%	2.7	14	35.71%	2.0
Pangolier	10	25.00%	66.29	59.55	4	75.00%	1.3	6	16.67%	0.9
Batrider	12	30.00%	65.17	66.29	3	33.33%	1.0	9	55.56%	1.3
Terrorblade	14	35.00%	64.04	70.79	2	0.00%	0.7	12	58.33%	1.7
Doom	5	12.50%	62.92	34.83	5	60.00%	1.7	0	0.00%	0.0
Lina	3	7.50%	61.80	16.85	2	100.00%	0.7	1	0.00%	0.1
Medusa	13	32.50%	60.67	68.54	3	66.67%	1.0	10	30.00%	1.4
Snapfire	8	20.00%	59.55	58.43	6	50.00%	2.0	2	50.00%	0.3
Dark Seer	2	5.00%	58.43	4.49	1	100.00%	0.3	1	100.00%	0.1
Enchantress	12	30.00%	57.30	71.91	7	42.86%	2.3	5	40.00%	0.7
Luna	16	40.00%	56.18	93.26	10	40.00%	3.3	6	16.67%	0.9
Ember Spirit	16	40.00%	55.06	89.89	7	42.86%	2.3	9	22.22%	1.3
Mars	12	30.00%	53.93	73.03	3	33.33%	1.0	9	44.44%	1.3
Lycan	16	40.00%	52.81	86.52	1	0.00%	0.3	15	40.00%	2.1
Bane	3	7.50%	51.69	22.47	3	66.67%	1.0	0	0.00%	0.0
Ancient Apparition	3	7.50%	51.69	22.47	3	66.67%	1.0	0	0.00%	0.0
Void Spirit	17	42.50%	49.44	96.63	8	37.50%	2.7	9	22.22%	1.3
Rubick	3	7.50%	48.31	17.98	1	100.00%	0.3	2	50.00%	0.3
Necrophos	10	25.00%	47.19	75.28	6	33.33%	2.0	4	50.00%	0.6
Wraith King	2	5.00%	46.07	7.87	0	0.00%	0.0	2	100.00%	0.3
Chen	5	12.50%	44.94	46.07	3	33.33%	1.0	2	100.00%	0.3
Io	5	12.50%	43.82	47.19	3	66.67%	1.0	2	0.00%	0.3
Lifestealer	7	17.50%	42.70	56.18	2	50.00%	0.7	5	40.00%	0.7
Ursa	4	10.00%	41.57	26.97	1	0.00%	0.3	3	100.00%	0.4
Brewmaster	6	15.00%	40.45	53.93	3	33.33%	1.0	3	66.67%	0.4
Weaver	11	27.50%	39.33	85.39	5	20.00%	1.7	6	50.00%	0.9
Visage	5	12.50%	38.20	44.94	1	100.00%	0.3	4	25.00%	0.6
Huskar	1	2.50%	37.08	1.12	1	100.00%	0.3	0	0.00%	0.0
Leshrac	1	2.50%	37.08	13.48	1	100.00%	0.3	0	0.00%	0.0
Sniper	1	2.50%	37.08	13.48	1	100.00%	0.3	0	0.00%	0.0
Storm Spirit	1	2.50%	37.08	13.48	1	100.00%	0.3	0	0.00%	0.0
Pudge	1	2.50%	37.08	13.48	1	100.00%	0.3	0	0.00%	0.0
Grimstroke	4	10.00%	31.46	35.96	2	50.00%	0.7	2	50.00%	0.3
Chaos Knight	10	25.00%	30.34	80.90	3	33.33%	1.0	7	28.57%	1.0
Phantom Assassin	2	5.00%	29.21	19.10	1	100.00%	0.3	1	0.00%	0.1
Dragon Knight	10	25.00%	28.09	91.01	6	16.67%	2.0	4	50.00%	0.6
Lone Druid	10	25.00%	26.97	84.27	1	0.00%	0.3	9	33.33%	1.3
Slardar	5	12.50%	25.84	62.92	4	25.00%	1.3	1	100.00%	0.1
Treant Protector	2	5.00%	24.72	25.84	2	50.00%	0.7	0	0.00%	0.0
Jakiro	2	5.00%	24.72	25.84	2	50.00%	0.7	0	0.00%	0.0
Drow Ranger	1	2.50%	22.47	3.37	0	0.00%	0.0	1	100.00%	0.1
Abaddon	1	2.50%	22.47	6.74	0	0.00%	0.0	1	100.00%	0.1
Anti-Mage	1	2.50%	22.47	6.74	0	0.00%	0.0	1	100.00%	0.1
Legion Commander	1	2.50%	22.47	8.99	0	0.00%	0.0	1	100.00%	0.1
Spectre	1	2.50%	22.47	14.61	0	0.00%	0.0	1	100.00%	0.1
Skywrath Mage	3	7.50%	16.85	49.44	3	33.33%	1.0	0	0.00%	0.0
Night Stalker	13	32.50%	15.73	100.00	3	0.00%	1.0	10	20.00%	1.4
Queen of Pain	3	7.50%	14.61	33.71	0	0.00%	0.0	3	33.33%	0.4
Invoker	2	5.00%	13.48	31.46	1	0.00%	0.3	1	100.00%	0.1
Windranger	2	5.00%	13.48	31.46	1	0.00%	0.3	1	100.00%	0.1
Mirana	2	5.00%	13.48	31.46	1	0.00%	0.3	1	100.00%	0.1
Venomancer	3	7.50%	10.11	48.31	1	0.00%	0.3	2	50.00%	0.3
Keeper of the Light	1	2.50%	8.99	23.60	0	0.00%	0.0	1	0.00%	0.1
Crystal Maiden	1	2.50%	7.87	42.70	1	0.00%	0.3	0	0.00%	0.0
Hoodwink	2	5.00%	6.74	57.30	1	0.00%	0.3	1	0.00%	0.1
Undying	1	2.50%	5.62	42.70	1	0.00%	0.3	0	0.00%	0.0
Arc Warden	1	2.50%	5.62	42.70	1	0.00%	0.3	0	0.00%	0.0
Clinkz	1	2.50%	5.62	42.70	1	0.00%	0.3	0	0.00%	0.0
Outworld Destroyer	1	2.50%	5.62	42.70	1	0.00%	0.3	0	0.00%	0.0
Tidehunter	1	2.50%	5.62	42.70	1	0.00%	0.3	0	0.00%	0.0