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): 3 - Matches: 37

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

Balance rank	Winrate	Pickrate	Contest Rate
47.0	47.7	48.0	43.1

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Mirana	28	75.68%	100.00	53.13	15	60.00%	5.0	13	100.00%	4.3
Broodmother	12	32.43%	98.96	23.96	5	100.00%	1.7	7	57.14%	2.3
Doom	29	78.38%	97.92	77.08	8	62.50%	2.7	21	57.14%	7.0
Snapfire	6	16.22%	96.88	19.79	5	100.00%	1.7	1	0.00%	0.3
Techies	4	10.81%	95.83	16.67	4	100.00%	1.3	0	0.00%	0.0
Lifestealer	27	72.97%	94.79	79.17	6	66.67%	2.0	21	52.38%	7.0
Leshrac	32	86.49%	93.75	89.58	14	50.00%	4.7	18	55.56%	6.0
Marci	37	100.00%	92.71	93.75	5	60.00%	1.7	32	46.88%	10.7
Naga Siren	30	81.08%	91.67	84.38	6	50.00%	2.0	24	54.17%	8.0
Bloodseeker	13	35.14%	90.63	42.71	3	66.67%	1.0	10	70.00%	3.3
Clockwerk	9	24.32%	89.58	34.38	8	75.00%	2.7	1	0.00%	0.3
Faceless Void	19	51.35%	88.54	63.54	4	75.00%	1.3	15	46.67%	5.0
Ember Spirit	26	70.27%	87.50	86.46	12	50.00%	4.0	14	50.00%	4.7
Tiny	24	64.86%	86.46	83.33	17	58.82%	5.7	7	14.29%	2.3
Pangolier	20	54.05%	85.42	78.13	8	50.00%	2.7	12	58.33%	4.0
Nyx Assassin	18	48.65%	84.38	72.92	10	40.00%	3.3	8	87.50%	2.7
Lina	25	67.57%	83.33	85.42	6	16.67%	2.0	19	68.42%	6.3
Tusk	31	83.78%	82.29	96.88	24	41.67%	8.0	7	57.14%	2.3
Morphling	29	78.38%	81.25	94.79	4	75.00%	1.3	25	36.00%	8.3
Puck	13	35.14%	80.21	52.08	2	0.00%	0.7	11	81.82%	3.7
Sniper	18	48.65%	79.17	73.96	3	100.00%	1.0	15	33.33%	5.0
Pudge	18	48.65%	78.13	80.21	8	50.00%	2.7	10	50.00%	3.3
Undying	13	35.14%	77.08	58.33	3	66.67%	1.0	10	50.00%	3.3
Dawnbreaker	14	37.84%	76.04	65.63	9	55.56%	3.0	5	40.00%	1.7
Batrider	23	62.16%	75.00	91.67	0	0.00%	0.0	23	43.48%	7.7
Razor	4	10.81%	73.96	20.83	2	100.00%	0.7	2	50.00%	0.7
Beastmaster	26	70.27%	72.92	97.92	9	33.33%	3.0	17	47.06%	5.7
Shadow Fiend	7	18.92%	71.88	35.42	4	75.00%	1.3	3	33.33%	1.0
Viper	6	16.22%	70.83	22.92	1	100.00%	0.3	5	60.00%	1.7
Dark Seer	2	5.41%	69.79	15.63	2	100.00%	0.7	0	0.00%	0.0
Brewmaster	2	5.41%	69.79	18.75	2	100.00%	0.7	0	0.00%	0.0
Jakiro	2	5.41%	69.79	18.75	2	100.00%	0.7	0	0.00%	0.0
Rubick	9	24.32%	66.67	55.21	8	50.00%	2.7	1	100.00%	0.3
Disruptor	12	32.43%	65.63	70.83	9	44.44%	3.0	3	66.67%	1.0
Enigma	16	43.24%	64.58	82.29	2	50.00%	0.7	14	42.86%	4.7
Slark	15	40.54%	63.54	81.25	3	33.33%	1.0	12	50.00%	4.0
Visage	26	70.27%	62.50	98.96	11	36.36%	3.7	15	33.33%	5.0
Lich	19	51.35%	61.46	95.83	15	40.00%	5.0	4	25.00%	1.3
Monkey King	19	51.35%	60.42	92.71	4	25.00%	1.3	15	46.67%	5.0
Mars	11	29.73%	59.38	66.67	6	50.00%	2.0	5	40.00%	1.7
Drow Ranger	6	16.22%	58.33	33.33	2	100.00%	0.7	4	25.00%	1.3
Earthshaker	8	21.62%	57.29	59.38	8	50.00%	2.7	0	0.00%	0.0
Ursa	5	13.51%	56.25	29.17	3	66.67%	1.0	2	50.00%	0.7
Phoenix	2	5.41%	55.21	13.54	1	100.00%	0.3	1	100.00%	0.3
Hoodwink	6	16.22%	54.17	46.88	5	60.00%	1.7	1	0.00%	0.3
Gyrocopter	4	10.81%	53.13	21.88	2	50.00%	0.7	2	100.00%	0.7
Primal Beast	22	59.46%	52.08	100.00	3	0.00%	1.0	19	36.84%	6.3
Bristleback	7	18.92%	51.04	57.29	4	50.00%	1.3	3	33.33%	1.0
Phantom Assassin	4	10.81%	50.00	32.29	3	66.67%	1.0	1	0.00%	0.3
Lion	8	21.62%	48.96	71.88	7	42.86%	2.3	1	0.00%	0.3
Luna	2	5.41%	47.92	1.04	0	0.00%	0.0	2	100.00%	0.7
Crystal Maiden	11	29.73%	46.88	90.63	10	30.00%	3.3	1	100.00%	0.3
Terrorblade	4	10.81%	45.83	27.08	1	100.00%	0.3	3	33.33%	1.0
Huskar	4	10.81%	45.83	27.08	1	100.00%	0.3	3	33.33%	1.0
Invoker	8	21.62%	43.75	60.42	2	0.00%	0.7	6	66.67%	2.0
Underlord	1	2.70%	42.71	12.50	1	100.00%	0.3	0	0.00%	0.0
Omniknight	1	2.70%	42.71	12.50	1	100.00%	0.3	0	0.00%	0.0
Legion Commander	1	2.70%	42.71	12.50	1	100.00%	0.3	0	0.00%	0.0
Oracle	1	2.70%	42.71	12.50	1	100.00%	0.3	0	0.00%	0.0
Ancient Apparition	1	2.70%	42.71	3.13	1	100.00%	0.3	0	0.00%	0.0
Wraith King	1	2.70%	42.71	3.13	1	100.00%	0.3	0	0.00%	0.0
Witch Doctor	1	2.70%	42.71	12.50	1	100.00%	0.3	0	0.00%	0.0
Dragon Knight	1	2.70%	42.71	14.58	1	100.00%	0.3	0	0.00%	0.0
Silencer	5	13.51%	34.38	51.04	2	0.00%	0.7	3	100.00%	1.0
Death Prophet	7	18.92%	33.33	68.75	2	50.00%	0.7	5	20.00%	1.7
Queen of Pain	7	18.92%	33.33	68.75	2	50.00%	0.7	5	20.00%	1.7
Magnus	3	8.11%	31.25	28.13	1	0.00%	0.3	2	100.00%	0.7
Venomancer	1	2.70%	30.21	7.29	0	0.00%	0.0	1	100.00%	0.3
Night Stalker	1	2.70%	30.21	7.29	0	0.00%	0.0	1	100.00%	0.3
Anti-Mage	1	2.70%	30.21	7.29	0	0.00%	0.0	1	100.00%	0.3
Warlock	1	2.70%	30.21	7.29	0	0.00%	0.0	1	100.00%	0.3
Storm Spirit	3	8.11%	26.04	41.67	2	50.00%	0.7	1	0.00%	0.3
Arc Warden	4	10.81%	25.00	54.17	2	50.00%	0.7	2	0.00%	0.7
Templar Assassin	4	10.81%	23.96	64.58	4	25.00%	1.3	0	0.00%	0.0
Shadow Demon	2	5.41%	22.92	31.25	1	0.00%	0.3	1	100.00%	0.3
Dazzle	2	5.41%	22.92	31.25	1	0.00%	0.3	1	100.00%	0.3
Kunkka	3	8.11%	20.83	50.00	1	0.00%	0.3	2	50.00%	0.7
Outworld Destroyer	3	8.11%	20.83	50.00	1	0.00%	0.3	2	50.00%	0.7
Juggernaut	3	8.11%	20.83	50.00	1	0.00%	0.3	2	50.00%	0.7
Troll Warlord	3	8.11%	17.71	56.25	2	0.00%	0.7	1	100.00%	0.3
Tidehunter	4	10.81%	16.67	69.79	2	0.00%	0.7	2	50.00%	0.7
Io	1	2.70%	15.63	40.63	1	0.00%	0.3	0	0.00%	0.0
Spirit Breaker	1	2.70%	15.63	40.63	1	0.00%	0.3	0	0.00%	0.0
Grimstroke	1	2.70%	15.63	40.63	1	0.00%	0.3	0	0.00%	0.0
Medusa	3	8.11%	12.50	76.04	1	0.00%	0.3	2	0.00%	0.7
Sven	3	8.11%	11.46	88.54	3	0.00%	1.0	0	0.00%	0.0
Nature's Prophet	1	2.70%	10.42	40.63	1	0.00%	0.3	0	0.00%	0.0
Zeus	2	5.41%	9.38	62.50	2	0.00%	0.7	0	0.00%	0.0
Chaos Knight	3	8.11%	8.33	88.54	3	0.00%	1.0	0	0.00%	0.0
Slardar	3	8.11%	7.29	76.04	1	0.00%	0.3	2	0.00%	0.7
Dark Willow	1	2.70%	6.25	25.00	0	0.00%	0.0	1	0.00%	0.3
Winter Wyvern	2	5.41%	5.21	62.50	2	0.00%	0.7	0	0.00%	0.0
Lycan	2	5.41%	4.17	45.83	0	0.00%	0.0	2	0.00%	0.7
Phantom Lancer	2	5.41%	4.17	45.83	0	0.00%	0.0	2	0.00%	0.7
Void Spirit	2	5.41%	4.17	45.83	0	0.00%	0.0	2	0.00%	0.7
Bane	1	2.70%	1.04	40.63	1	0.00%	0.3	0	0.00%	0.0