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): 6 - Median hero bans (mb): 1 - Matches: 49

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

Balance rank	Winrate	Pickrate	Contest Rate
59.7	78.1	47.3	29.5

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Rubick	21	42.86%	100.00	40.66	17	76.47%	2.8	4	75.00%	4.0
Death Prophet	22	44.90%	98.90	43.96	5	60.00%	0.8	17	76.47%	17.0
Winter Wyvern	45	91.84%	97.80	82.42	25	56.00%	4.2	20	60.00%	20.0
Nyx Assassin	20	40.82%	96.70	45.05	10	70.00%	1.7	10	70.00%	10.0
Ogre Magi	12	24.49%	95.60	25.27	10	80.00%	1.7	2	50.00%	2.0
Night Stalker	46	93.88%	94.51	86.81	15	60.00%	2.5	31	48.39%	31.0
Underlord	6	12.24%	93.41	10.99	5	100.00%	0.8	1	0.00%	1.0
Huskar	9	18.37%	92.31	17.58	5	80.00%	0.8	4	75.00%	4.0
Chaos Knight	26	53.06%	91.21	67.03	7	57.14%	1.2	19	57.89%	19.0
Faceless Void	14	28.57%	90.11	41.76	2	50.00%	0.3	12	75.00%	12.0
Earth Spirit	25	51.02%	89.01	68.13	9	66.67%	1.5	16	43.75%	16.0
Omniknight	49	100.00%	87.91	97.80	4	50.00%	0.7	45	44.44%	45.0
Bane	41	83.67%	86.81	92.31	7	57.14%	1.2	34	44.12%	34.0
Luna	16	32.65%	85.71	49.45	8	62.50%	1.3	8	62.50%	8.0
Doom	17	34.69%	84.62	53.85	9	77.78%	1.5	8	25.00%	8.0
Queen of Pain	36	73.47%	83.52	89.01	9	44.44%	1.5	27	51.85%	27.0
Medusa	36	73.47%	83.52	89.01	9	44.44%	1.5	27	51.85%	27.0
Tidehunter	36	73.47%	81.32	90.11	17	35.29%	2.8	19	68.42%	19.0
Outworld Destroyer	17	34.69%	80.22	58.24	7	71.43%	1.2	10	40.00%	10.0
Shadow Fiend	25	51.02%	79.12	79.12	12	58.33%	2.0	13	38.46%	13.0
Gyrocopter	24	48.98%	78.02	78.02	17	52.94%	2.8	7	42.86%	7.0
Brewmaster	40	81.63%	76.92	95.60	10	30.00%	1.7	30	53.33%	30.0
Shadow Demon	13	26.53%	75.82	52.75	12	58.33%	2.0	1	100.00%	1.0
Sand King	28	57.14%	74.73	85.71	23	43.48%	3.8	5	80.00%	5.0
Puck	38	77.55%	73.63	96.70	15	40.00%	2.5	23	47.83%	23.0
Tinker	27	55.10%	72.53	84.62	9	44.44%	1.5	18	50.00%	18.0
Templar Assassin	18	36.73%	71.43	64.84	6	66.67%	1.0	12	41.67%	12.0
Necrophos	3	6.12%	70.33	9.89	2	100.00%	0.3	1	100.00%	1.0
Spirit Breaker	15	30.61%	69.23	63.74	13	53.85%	2.2	2	50.00%	2.0
Ember Spirit	10	20.41%	68.13	42.86	6	66.67%	1.0	4	50.00%	4.0
Terrorblade	7	14.29%	67.03	16.48	1	100.00%	0.2	6	66.67%	6.0
Silencer	19	38.78%	65.93	74.73	8	25.00%	1.3	11	81.82%	11.0
Tusk	12	24.49%	64.84	56.04	10	50.00%	1.7	2	100.00%	2.0
Razor	35	71.43%	63.74	98.90	6	50.00%	1.0	29	34.48%	29.0
Clockwerk	16	32.65%	62.64	71.43	9	55.56%	1.5	7	28.57%	7.0
Dragon Knight	11	22.45%	61.54	57.14	8	62.50%	1.3	3	0.00%	3.0
Juggernaut	10	20.41%	60.44	54.95	9	55.56%	1.5	1	0.00%	1.0
Phantom Lancer	4	8.16%	59.34	14.29	3	66.67%	0.5	1	100.00%	1.0
Viper	16	32.65%	58.24	81.32	6	33.33%	1.0	10	50.00%	10.0
Sniper	11	22.45%	57.14	70.33	8	37.50%	1.3	3	66.67%	3.0
Timbersaw	7	14.29%	56.04	48.35	5	40.00%	0.8	2	100.00%	2.0
Meepo	21	42.86%	54.95	94.51	3	33.33%	0.5	18	33.33%	18.0
Slardar	3	6.12%	53.85	15.38	3	66.67%	0.5	0	0.00%	0.0
Lifestealer	10	20.41%	52.75	72.53	8	37.50%	1.3	2	50.00%	2.0
Shadow Shaman	11	22.45%	51.65	83.52	11	36.36%	1.8	0	0.00%	0.0
Anti-Mage	3	6.12%	50.55	12.09	1	100.00%	0.2	2	50.00%	2.0
Mirana	13	26.53%	49.45	80.22	1	0.00%	0.2	12	41.67%	12.0
Storm Spirit	12	24.49%	48.35	76.92	2	0.00%	0.3	10	50.00%	10.0
Spectre	4	8.16%	47.25	21.98	1	0.00%	0.2	3	100.00%	3.0
Sven	4	8.16%	46.15	23.08	1	100.00%	0.2	3	33.33%	3.0
Beastmaster	10	20.41%	45.05	75.82	4	50.00%	0.7	6	16.67%	6.0
Tiny	8	16.33%	43.96	69.23	6	33.33%	1.0	2	50.00%	2.0
Arc Warden	3	6.12%	42.86	18.68	2	50.00%	0.3	1	100.00%	1.0
Undying	5	10.20%	41.76	47.25	4	50.00%	0.7	1	0.00%	1.0
Troll Warlord	1	2.04%	40.66	1.10	1	100.00%	0.2	0	0.00%	0.0
Crystal Maiden	1	2.04%	40.66	6.59	1	100.00%	0.2	0	0.00%	0.0
Zeus	1	2.04%	40.66	6.59	1	100.00%	0.2	0	0.00%	0.0
Axe	1	2.04%	40.66	6.59	1	100.00%	0.2	0	0.00%	0.0
Witch Doctor	1	2.04%	40.66	6.59	1	100.00%	0.2	0	0.00%	0.0
Vengeful Spirit	13	26.53%	35.16	93.41	9	33.33%	1.5	4	0.00%	4.0
Bristleback	2	4.08%	34.07	13.19	1	100.00%	0.2	1	0.00%	1.0
Earthshaker	2	4.08%	32.97	24.18	2	50.00%	0.3	0	0.00%	0.0
Drow Ranger	1	2.04%	31.87	2.20	0	0.00%	0.0	1	100.00%	1.0
Centaur Warrunner	1	2.04%	31.87	8.79	0	0.00%	0.0	1	100.00%	1.0
Broodmother	1	2.04%	31.87	8.79	0	0.00%	0.0	1	100.00%	1.0
Abaddon	3	6.12%	28.57	39.56	2	50.00%	0.3	1	0.00%	1.0
Weaver	3	6.12%	28.57	39.56	2	50.00%	0.3	1	0.00%	1.0
Slark	3	6.12%	28.57	39.56	2	50.00%	0.3	1	0.00%	1.0
Dazzle	3	6.12%	28.57	39.56	2	50.00%	0.3	1	0.00%	1.0
Ursa	9	18.37%	24.18	91.21	5	20.00%	0.8	4	25.00%	4.0
Invoker	3	6.12%	23.08	46.15	3	33.33%	0.5	0	0.00%	0.0
Morphling	5	10.20%	21.98	65.93	3	0.00%	0.5	2	100.00%	2.0
Disruptor	4	8.16%	20.88	62.64	4	25.00%	0.7	0	0.00%	0.0
Venomancer	1	2.04%	19.78	35.16	1	0.00%	0.2	0	0.00%	0.0
Oracle	1	2.04%	19.78	35.16	1	0.00%	0.2	0	0.00%	0.0
Elder Titan	1	2.04%	19.78	35.16	1	0.00%	0.2	0	0.00%	0.0
Skywrath Mage	1	2.04%	19.78	35.16	1	0.00%	0.2	0	0.00%	0.0
Magnus	1	2.04%	15.38	20.88	0	0.00%	0.0	1	0.00%	1.0
Io	1	2.04%	14.29	35.16	1	0.00%	0.2	0	0.00%	0.0
Legion Commander	2	4.08%	13.19	61.54	2	0.00%	0.3	0	0.00%	0.0
Treant Protector	1	2.04%	12.09	35.16	1	0.00%	0.2	0	0.00%	0.0
Bounty Hunter	1	2.04%	12.09	35.16	1	0.00%	0.2	0	0.00%	0.0
Pugna	1	2.04%	12.09	35.16	1	0.00%	0.2	0	0.00%	0.0
Keeper of the Light	1	2.04%	12.09	35.16	1	0.00%	0.2	0	0.00%	0.0
Batrider	2	4.08%	7.69	51.65	1	0.00%	0.2	1	0.00%	1.0
Ancient Apparition	2	4.08%	6.59	61.54	2	0.00%	0.3	0	0.00%	0.0
Lion	2	4.08%	5.49	51.65	1	0.00%	0.2	1	0.00%	1.0
Nature's Prophet	2	4.08%	4.40	61.54	2	0.00%	0.3	0	0.00%	0.0
Monkey King	3	6.12%	3.30	73.63	2	0.00%	0.3	1	0.00%	1.0
Jakiro	6	12.24%	2.20	100.00	6	0.00%	1.0	0	0.00%	0.0
Kunkka	1	2.04%	1.10	20.88	0	0.00%	0.0	1	0.00%	1.0