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): 5 - Matches: 61

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

Balance rank	Winrate	Pickrate	Contest Rate
62.2	80.8	49.1	32.7

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Queen of Pain	59	96.72%	100.00	82.42	28	64.29%	7.0	31	51.61%	6.2
Leshrac	53	86.89%	98.90	87.91	34	58.82%	8.5	19	47.37%	3.8
Broodmother	37	60.66%	97.80	67.03	5	60.00%	1.3	32	62.50%	6.4
Beastmaster	42	68.85%	96.70	74.73	13	61.54%	3.3	29	55.17%	5.8
Earthshaker	31	50.82%	95.60	62.64	15	60.00%	3.8	16	62.50%	3.2
Shadow Fiend	37	60.66%	94.51	75.82	25	60.00%	6.3	12	41.67%	2.4
Pugna	10	16.39%	93.41	14.29	5	80.00%	1.3	5	80.00%	1.0
Bristleback	23	37.70%	92.31	51.65	7	57.14%	1.8	16	68.75%	3.2
Keeper of the Light	26	42.62%	91.21	64.84	15	53.33%	3.8	11	72.73%	2.2
Io	60	98.36%	90.11	97.80	16	37.50%	4.0	44	52.27%	8.8
Disruptor	36	59.02%	89.01	85.71	23	52.17%	5.8	13	53.85%	2.6
Undying	54	88.52%	87.91	95.60	8	50.00%	2.0	46	45.65%	9.2
Clockwerk	30	49.18%	86.81	78.02	21	52.38%	5.3	9	55.56%	1.8
Phantom Lancer	30	49.18%	85.71	76.92	12	41.67%	3.0	18	66.67%	3.6
Dark Seer	31	50.82%	84.62	83.52	16	50.00%	4.0	15	53.33%	3.0
Drow Ranger	11	18.03%	83.52	24.18	3	100.00%	0.8	8	50.00%	1.6
Rubick	29	47.54%	82.42	80.22	24	45.83%	6.0	5	100.00%	1.0
Witch Doctor	22	36.07%	81.32	73.63	19	52.63%	4.8	3	66.67%	0.6
Gyrocopter	59	96.72%	80.22	98.90	27	40.74%	6.8	32	40.63%	6.4
Ember Spirit	10	16.39%	79.12	32.97	5	80.00%	1.3	5	40.00%	1.0
Winter Wyvern	10	16.39%	78.02	35.16	7	71.43%	1.8	3	33.33%	0.6
Weaver	8	13.11%	76.92	23.08	5	80.00%	1.3	3	33.33%	0.6
Shadow Demon	35	57.38%	75.82	93.41	18	50.00%	4.5	17	29.41%	3.4
Venomancer	3	4.92%	74.73	2.20	2	100.00%	0.5	1	100.00%	0.2
Crystal Maiden	3	4.92%	74.73	7.69	2	100.00%	0.5	1	100.00%	0.2
Axe	10	16.39%	72.53	37.36	6	66.67%	1.5	4	50.00%	0.8
Nature's Prophet	9	14.75%	71.43	26.37	3	66.67%	0.8	6	66.67%	1.2
Storm Spirit	12	19.67%	70.33	47.25	7	57.14%	1.8	5	60.00%	1.0
Nyx Assassin	18	29.51%	69.23	71.43	10	40.00%	2.5	8	75.00%	1.6
Viper	25	40.98%	68.13	89.01	9	44.44%	2.3	16	43.75%	3.2
Chen	26	42.62%	67.03	91.21	11	45.45%	2.8	15	40.00%	3.0
Ancient Apparition	22	36.07%	65.93	84.62	9	44.44%	2.3	13	46.15%	2.6
Dragon Knight	21	34.43%	64.84	86.81	15	40.00%	3.8	6	66.67%	1.2
Puck	20	32.79%	63.74	79.12	9	44.44%	2.3	11	45.45%	2.2
Bounty Hunter	11	18.03%	62.64	46.15	3	66.67%	0.8	8	50.00%	1.6
Spirit Breaker	13	21.31%	61.54	59.34	7	42.86%	1.8	6	66.67%	1.2
Visage	12	19.67%	60.44	50.55	3	66.67%	0.8	9	44.44%	1.8
Juggernaut	12	19.67%	59.34	58.24	8	50.00%	2.0	4	50.00%	0.8
Dazzle	20	32.79%	58.24	92.31	11	36.36%	2.8	9	44.44%	1.8
Tidehunter	5	8.20%	57.14	27.47	5	60.00%	1.3	0	0.00%	0.0
Magnus	3	4.92%	56.04	10.99	2	100.00%	0.5	1	0.00%	0.2
Tusk	8	13.11%	54.95	36.26	1	100.00%	0.3	7	42.86%	1.4
Invoker	2	3.28%	53.85	1.10	1	100.00%	0.3	1	100.00%	0.2
Ogre Magi	10	16.39%	52.75	61.54	8	50.00%	2.0	2	0.00%	0.4
Night Stalker	11	18.03%	51.65	63.74	5	40.00%	1.3	6	50.00%	1.2
Ursa	11	18.03%	50.55	65.93	5	60.00%	1.3	6	16.67%	1.2
Timbersaw	6	9.84%	49.45	34.07	3	66.67%	0.8	3	33.33%	0.6
Vengeful Spirit	5	8.20%	48.35	30.77	4	50.00%	1.0	1	100.00%	0.2
Lion	14	22.95%	47.25	90.11	12	33.33%	3.0	2	50.00%	0.4
Slardar	7	11.48%	46.15	43.96	3	66.67%	0.8	4	25.00%	0.8
Enchantress	9	14.75%	45.05	52.75	2	50.00%	0.5	7	42.86%	1.4
Enigma	3	4.92%	43.96	13.19	3	66.67%	0.8	0	0.00%	0.0
Lifestealer	5	8.20%	42.86	25.27	2	100.00%	0.5	3	0.00%	0.6
Troll Warlord	2	3.28%	41.76	3.30	0	0.00%	0.0	2	100.00%	0.4
Abaddon	3	4.92%	40.66	15.38	2	50.00%	0.5	1	100.00%	0.2
Luna	5	8.20%	39.56	45.05	4	50.00%	1.0	1	0.00%	0.2
Shadow Shaman	1	1.64%	38.46	6.59	1	100.00%	0.3	0	0.00%	0.0
Alchemist	1	1.64%	38.46	9.89	1	100.00%	0.3	0	0.00%	0.0
Spectre	1	1.64%	38.46	9.89	1	100.00%	0.3	0	0.00%	0.0
Bane	6	9.84%	35.16	68.13	6	33.33%	1.5	0	0.00%	0.0
Bloodseeker	13	21.31%	34.07	96.70	8	25.00%	2.0	5	20.00%	1.0
Razor	6	9.84%	32.97	49.45	2	50.00%	0.5	4	25.00%	0.8
Lich	2	3.28%	31.87	12.09	1	100.00%	0.3	1	0.00%	0.2
Templar Assassin	6	9.84%	30.77	57.14	3	33.33%	0.8	3	33.33%	0.6
Lina	6	9.84%	30.77	57.14	3	33.33%	0.8	3	33.33%	0.6
Lycan	7	11.48%	28.57	70.33	3	33.33%	0.8	4	25.00%	0.8
Kunkka	3	4.92%	27.47	19.78	1	100.00%	0.3	2	0.00%	0.4
Mirana	2	3.28%	26.37	18.68	2	50.00%	0.5	0	0.00%	0.0
Sniper	2	3.28%	26.37	18.68	2	50.00%	0.5	0	0.00%	0.0
Omniknight	2	3.28%	26.37	18.68	2	50.00%	0.5	0	0.00%	0.0
Brewmaster	1	1.64%	23.08	5.49	0	0.00%	0.0	1	100.00%	0.2
Medusa	1	1.64%	23.08	5.49	0	0.00%	0.0	1	100.00%	0.2
Huskar	3	4.92%	20.88	31.87	2	50.00%	0.5	1	0.00%	0.2
Sand King	3	4.92%	19.78	42.86	3	33.33%	0.8	0	0.00%	0.0
Sven	3	4.92%	19.78	42.86	3	33.33%	0.8	0	0.00%	0.0
Chaos Knight	3	4.92%	19.78	42.86	3	33.33%	0.8	0	0.00%	0.0
Windranger	3	4.92%	19.78	42.86	3	33.33%	0.8	0	0.00%	0.0
Batrider	6	9.84%	15.38	69.23	2	0.00%	0.5	4	50.00%	0.8
Phoenix	13	21.31%	14.29	100.00	9	11.11%	2.3	4	25.00%	0.8
Tiny	8	13.11%	13.19	94.51	5	20.00%	1.3	3	0.00%	0.6
Centaur Warrunner	2	3.28%	12.09	21.98	1	0.00%	0.3	1	100.00%	0.2
Faceless Void	2	3.28%	12.09	21.98	1	0.00%	0.3	1	100.00%	0.2
Skywrath Mage	3	4.92%	9.89	38.46	1	0.00%	0.3	2	50.00%	0.4
Naga Siren	4	6.56%	8.79	53.85	1	0.00%	0.3	3	33.33%	0.6
Zeus	4	6.56%	7.69	72.53	3	0.00%	0.8	1	100.00%	0.2
Slark	5	8.20%	6.59	81.32	3	0.00%	0.8	2	50.00%	0.4
Treant Protector	1	1.64%	5.49	29.67	1	0.00%	0.3	0	0.00%	0.0
Legion Commander	1	1.64%	5.49	29.67	1	0.00%	0.3	0	0.00%	0.0
Lone Druid	3	4.92%	3.30	60.44	1	0.00%	0.3	2	0.00%	0.4
Jakiro	2	3.28%	2.20	48.35	1	0.00%	0.3	1	0.00%	0.2
Pudge	2	3.28%	1.10	57.14	2	0.00%	0.5	0	0.00%	0.0