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): 7 - Matches: 58

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

Balance rank	Winrate	Pickrate	Contest Rate
61.6	84.4	40.4	35.6

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Batrider	56	96.55%	100.00	73.42	8	62.50%	2.0	48	60.42%	6.9
Doom	42	72.41%	98.73	63.29	19	63.16%	4.8	23	65.22%	3.3
Anti-Mage	8	13.79%	97.47	6.33	3	100.00%	0.8	5	80.00%	0.7
Ancient Apparition	55	94.83%	96.20	91.14	25	48.00%	6.3	30	60.00%	4.3
Rubick	35	60.34%	94.94	68.35	24	58.33%	6.0	11	54.55%	1.6
Weaver	19	32.76%	93.67	40.51	11	63.64%	2.8	8	75.00%	1.1
Centaur Warrunner	34	58.62%	92.41	70.89	26	53.85%	6.5	8	75.00%	1.1
Lycan	56	96.55%	91.14	96.20	4	50.00%	1.0	52	50.00%	7.4
Wraith King	30	51.72%	89.87	64.56	18	50.00%	4.5	12	83.33%	1.7
Treant Protector	43	74.14%	88.61	86.08	30	56.67%	7.5	13	30.77%	1.9
Puck	21	36.21%	87.34	50.63	12	66.67%	3.0	9	44.44%	1.3
Invoker	53	91.38%	86.08	97.47	22	45.45%	5.5	31	48.39%	4.4
Mirana	42	72.41%	84.81	92.41	35	51.43%	8.8	7	28.57%	1.0
Visage	16	27.59%	83.54	43.04	8	62.50%	2.0	8	62.50%	1.1
Viper	18	31.03%	82.28	48.10	7	71.43%	1.8	11	45.45%	1.6
Shadow Demon	16	27.59%	81.01	37.97	3	66.67%	0.8	13	61.54%	1.9
Timbersaw	12	20.69%	79.75	35.44	10	60.00%	2.5	2	100.00%	0.3
Pugna	13	22.41%	78.48	36.71	6	66.67%	1.5	7	57.14%	1.0
Outworld Destroyer	24	41.38%	77.22	72.15	11	54.55%	2.8	13	46.15%	1.9
Sand King	24	41.38%	75.95	74.68	16	50.00%	4.0	8	50.00%	1.1
Axe	14	24.14%	74.68	39.24	4	75.00%	1.0	10	50.00%	1.4
Dazzle	30	51.72%	73.42	88.61	20	40.00%	5.0	10	70.00%	1.4
Clockwerk	13	22.41%	72.15	44.30	9	66.67%	2.3	4	25.00%	0.6
Dragon Knight	21	36.21%	70.89	69.62	13	46.15%	3.3	8	62.50%	1.1
Huskar	6	10.34%	69.62	10.13	3	66.67%	0.8	3	100.00%	0.4
Lion	3	5.17%	68.35	1.27	2	100.00%	0.5	1	100.00%	0.1
Morphling	27	46.55%	67.09	87.34	17	52.94%	4.3	10	20.00%	1.4
Witch Doctor	12	20.69%	65.82	46.84	8	50.00%	2.0	4	75.00%	0.6
Enchantress	15	25.86%	64.56	58.23	6	66.67%	1.5	9	33.33%	1.3
Lifestealer	22	37.93%	63.29	82.28	14	50.00%	3.5	8	25.00%	1.1
Lich	17	29.31%	62.03	67.09	10	50.00%	2.5	7	42.86%	1.0
Nature's Prophet	13	22.41%	60.76	54.43	8	50.00%	2.0	5	60.00%	0.7
Luna	4	6.90%	59.49	7.59	2	100.00%	0.5	2	50.00%	0.3
Tidehunter	25	43.10%	58.23	93.67	12	41.67%	3.0	13	38.46%	1.9
Templar Assassin	24	41.38%	56.96	89.87	10	50.00%	2.5	14	28.57%	2.0
Shadow Shaman	8	13.79%	55.70	34.18	6	50.00%	1.5	2	100.00%	0.3
Naga Siren	19	32.76%	54.43	78.48	4	25.00%	1.0	15	53.33%	2.1
Dark Seer	31	53.45%	53.16	98.73	11	36.36%	2.8	20	35.00%	2.9
Beastmaster	2	3.45%	51.90	2.53	2	100.00%	0.5	0	0.00%	0.0
Nyx Assassin	18	31.03%	50.63	81.01	9	33.33%	2.3	9	55.56%	1.3
Venomancer	4	6.90%	49.37	12.66	3	66.67%	0.8	1	100.00%	0.1
Phantom Lancer	4	6.90%	49.37	12.66	3	66.67%	0.8	1	100.00%	0.1
Slark	15	25.86%	46.84	75.95	7	42.86%	1.8	8	37.50%	1.1
Brewmaster	40	68.97%	45.57	100.00	17	35.29%	4.3	23	17.39%	3.3
Tiny	2	3.45%	44.30	3.80	1	100.00%	0.3	1	100.00%	0.1
Chen	6	10.34%	43.04	31.65	3	66.67%	0.8	3	33.33%	0.4
Io	12	20.69%	41.77	62.03	2	50.00%	0.5	10	40.00%	1.4
Lone Druid	9	15.52%	40.51	49.37	4	25.00%	1.0	5	80.00%	0.7
Lina	3	5.17%	39.24	13.92	3	66.67%	0.8	0	0.00%	0.0
Bane	8	13.79%	37.97	56.96	6	50.00%	1.5	2	0.00%	0.3
Earthshaker	5	8.62%	36.71	21.52	2	50.00%	0.5	3	66.67%	0.4
Vengeful Spirit	9	15.52%	35.44	77.22	9	33.33%	2.3	0	0.00%	0.0
Keeper of the Light	3	5.17%	34.18	15.19	2	50.00%	0.5	1	100.00%	0.1
Crystal Maiden	1	1.72%	32.91	5.06	1	100.00%	0.3	0	0.00%	0.0
Storm Spirit	11	18.97%	31.65	79.75	5	40.00%	1.3	6	16.67%	0.9
Windranger	6	10.34%	30.38	60.76	6	33.33%	1.5	0	0.00%	0.0
Death Prophet	2	3.45%	29.11	8.86	1	100.00%	0.3	1	0.00%	0.1
Night Stalker	6	10.34%	27.85	55.70	3	33.33%	0.8	3	33.33%	0.4
Faceless Void	2	3.45%	26.58	18.99	2	50.00%	0.5	0	0.00%	0.0
Bloodseeker	4	6.90%	25.32	32.91	1	0.00%	0.3	3	66.67%	0.4
Ember Spirit	5	8.62%	24.05	41.77	1	0.00%	0.3	4	50.00%	0.6
Shadow Fiend	5	8.62%	22.78	65.82	4	25.00%	1.0	1	0.00%	0.1
Razor	7	12.07%	21.52	84.81	4	25.00%	1.0	3	0.00%	0.4
Elder Titan	2	3.45%	20.25	20.25	1	0.00%	0.3	1	100.00%	0.1
Disruptor	3	5.17%	18.99	45.57	2	0.00%	0.5	1	100.00%	0.1
Bounty Hunter	4	6.90%	17.72	59.49	2	0.00%	0.5	2	50.00%	0.3
Kunkka	1	1.72%	16.46	30.38	1	0.00%	0.3	0	0.00%	0.0
Gyrocopter	1	1.72%	16.46	30.38	1	0.00%	0.3	0	0.00%	0.0
Undying	1	1.72%	16.46	30.38	1	0.00%	0.3	0	0.00%	0.0
Silencer	1	1.72%	16.46	30.38	1	0.00%	0.3	0	0.00%	0.0
Queen of Pain	1	1.72%	16.46	30.38	1	0.00%	0.3	0	0.00%	0.0
Skywrath Mage	1	1.72%	16.46	30.38	1	0.00%	0.3	0	0.00%	0.0
Alchemist	1	1.72%	16.46	30.38	1	0.00%	0.3	0	0.00%	0.0
Sniper	1	1.72%	7.59	17.72	0	0.00%	0.0	1	0.00%	0.1
Drow Ranger	2	3.45%	6.33	53.16	2	0.00%	0.5	0	0.00%	0.0
Pudge	4	6.90%	5.06	94.94	4	0.00%	1.0	0	0.00%	0.0
Enigma	2	3.45%	3.80	53.16	2	0.00%	0.5	0	0.00%	0.0
Spectre	4	6.90%	2.53	83.54	2	0.00%	0.5	2	0.00%	0.3
Abaddon	1	1.72%	1.27	17.72	0	0.00%	0.0	1	0.00%	0.1