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

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

Balance rank	Winrate	Pickrate	Contest Rate
55.9	76.6	37.8	30.3

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Rubick	19	38.78%	100.00	11.49	7	71.43%	1.0	12	100.00%	12.0
Pugna	18	36.73%	98.85	21.84	7	100.00%	1.0	11	54.55%	11.0
Tiny	34	69.39%	97.70	48.28	21	66.67%	3.0	13	69.23%	13.0
Ember Spirit	16	32.65%	96.55	25.29	10	80.00%	1.4	6	66.67%	6.0
Snapfire	37	75.51%	95.40	65.52	24	62.50%	3.4	13	61.54%	13.0
Lifestealer	31	63.27%	94.25	59.77	12	58.33%	1.7	19	68.42%	19.0
Terrorblade	29	59.18%	93.10	63.22	12	58.33%	1.7	17	64.71%	17.0
Magnus	26	53.06%	91.95	47.13	4	75.00%	0.6	22	59.09%	22.0
Sven	39	79.59%	90.80	83.91	16	50.00%	2.3	23	60.87%	23.0
Lina	38	77.55%	89.66	85.06	15	40.00%	2.1	23	69.57%	23.0
Puck	12	24.49%	88.51	20.69	4	100.00%	0.6	8	50.00%	8.0
Viper	33	67.35%	87.36	79.31	11	36.36%	1.6	22	72.73%	22.0
Phoenix	22	44.90%	86.21	54.02	16	56.25%	2.3	6	83.33%	6.0
Slardar	31	63.27%	85.06	78.16	14	64.29%	2.0	17	41.18%	17.0
Spectre	25	51.02%	83.91	64.37	11	72.73%	1.6	14	35.71%	14.0
Omniknight	20	40.82%	82.76	45.98	11	63.64%	1.6	9	55.56%	9.0
Drow Ranger	27	55.10%	81.61	74.71	8	50.00%	1.1	19	57.89%	19.0
Enchantress	8	16.33%	80.46	18.39	4	75.00%	0.6	4	75.00%	4.0
Ancient Apparition	5	10.20%	79.31	6.90	3	100.00%	0.4	2	50.00%	2.0
Undying	40	81.63%	78.16	93.10	23	43.48%	3.3	17	47.06%	17.0
Void Spirit	27	55.10%	77.01	81.61	11	45.45%	1.6	16	56.25%	16.0
Leshrac	36	73.47%	75.86	90.80	15	40.00%	2.1	21	52.38%	21.0
Earth Spirit	22	44.90%	74.71	75.86	13	53.85%	1.9	9	44.44%	9.0
Troll Warlord	19	38.78%	73.56	58.62	1	100.00%	0.1	18	50.00%	18.0
Morphling	33	67.35%	72.41	91.95	6	66.67%	0.9	27	33.33%	27.0
Mars	41	83.67%	71.26	96.55	22	36.36%	3.1	19	47.37%	19.0
Storm Spirit	22	44.90%	70.11	80.46	7	42.86%	1.0	15	53.33%	15.0
Tidehunter	14	28.57%	68.97	43.68	4	50.00%	0.6	10	60.00%	10.0
Windranger	14	28.57%	67.82	57.47	7	71.43%	1.0	7	14.29%	7.0
Invoker	25	51.02%	66.67	86.21	5	40.00%	0.7	20	45.00%	20.0
Elder Titan	9	18.37%	65.52	35.63	4	75.00%	0.6	5	40.00%	5.0
Bloodseeker	32	65.31%	64.37	94.25	12	50.00%	1.7	20	25.00%	20.0
Beastmaster	16	32.65%	63.22	68.97	5	40.00%	0.7	11	54.55%	11.0
Clockwerk	14	28.57%	62.07	67.82	9	55.56%	1.3	5	20.00%	5.0
Legion Commander	11	22.45%	60.92	41.38	4	75.00%	0.6	7	28.57%	7.0
Phantom Assassin	22	44.90%	59.77	89.66	7	42.86%	1.0	15	33.33%	15.0
Timbersaw	33	67.35%	58.62	100.00	2	50.00%	0.3	31	29.03%	31.0
Faceless Void	30	61.22%	57.47	98.85	5	20.00%	0.7	25	36.00%	25.0
Anti-Mage	14	28.57%	56.32	77.01	5	40.00%	0.7	9	44.44%	9.0
Underlord	7	14.29%	55.17	36.78	4	75.00%	0.6	3	0.00%	3.0
Batrider	27	55.10%	54.02	95.40	4	0.00%	0.6	23	43.48%	23.0
Crystal Maiden	5	10.20%	52.87	19.54	3	66.67%	0.4	2	50.00%	2.0
Juggernaut	10	20.41%	51.72	49.43	3	66.67%	0.4	7	28.57%	7.0
Vengeful Spirit	11	22.45%	50.57	70.11	6	16.67%	0.9	5	100.00%	5.0
Mirana	9	18.37%	49.43	62.07	7	42.86%	1.0	2	50.00%	2.0
Centaur Warrunner	3	6.12%	48.28	9.20	3	66.67%	0.4	0	0.00%	0.0
Queen of Pain	8	16.33%	47.13	56.32	6	33.33%	0.9	2	100.00%	2.0
Alchemist	3	6.12%	45.98	8.05	1	100.00%	0.1	2	50.00%	2.0
Phantom Lancer	7	14.29%	44.83	37.93	1	100.00%	0.1	6	33.33%	6.0
Kunkka	12	24.49%	43.68	73.56	1	0.00%	0.1	11	45.45%	11.0
Shadow Demon	5	10.20%	42.53	34.48	3	33.33%	0.4	2	100.00%	2.0
Zeus	9	18.37%	41.38	55.17	1	0.00%	0.1	8	50.00%	8.0
Io	18	36.73%	40.23	97.70	11	18.18%	1.6	7	42.86%	7.0
Keeper of the Light	1	2.04%	39.08	3.45	1	100.00%	0.1	0	0.00%	0.0
Meepo	1	2.04%	39.08	3.45	1	100.00%	0.1	0	0.00%	0.0
Dazzle	1	2.04%	39.08	3.45	1	100.00%	0.1	0	0.00%	0.0
Tusk	6	12.24%	35.63	42.53	4	50.00%	0.6	2	0.00%	2.0
Templar Assassin	7	14.29%	34.48	60.92	4	25.00%	0.6	3	66.67%	3.0
Grimstroke	7	14.29%	33.33	66.67	5	40.00%	0.7	2	0.00%	2.0
Oracle	10	20.41%	32.18	88.51	6	16.67%	0.9	4	50.00%	4.0
Chaos Knight	8	16.33%	31.03	72.41	2	0.00%	0.3	6	50.00%	6.0
Treant Protector	2	4.08%	29.89	17.24	2	50.00%	0.3	0	0.00%	0.0
Gyrocopter	2	4.08%	29.89	17.24	2	50.00%	0.3	0	0.00%	0.0
Enigma	2	4.08%	29.89	17.24	2	50.00%	0.3	0	0.00%	0.0
Sand King	2	4.08%	29.89	17.24	2	50.00%	0.3	0	0.00%	0.0
Pangolier	2	4.08%	29.89	17.24	2	50.00%	0.3	0	0.00%	0.0
Dragon Knight	1	2.04%	24.14	5.75	0	0.00%	0.0	1	100.00%	1.0
Naga Siren	1	2.04%	24.14	5.75	0	0.00%	0.0	1	100.00%	1.0
Venomancer	3	6.12%	21.84	33.33	2	50.00%	0.3	1	0.00%	1.0
Doom	7	14.29%	20.69	71.26	1	0.00%	0.1	6	33.33%	6.0
Clinkz	2	4.08%	19.54	24.14	1	0.00%	0.1	1	100.00%	1.0
Nyx Assassin	2	4.08%	19.54	24.14	1	0.00%	0.1	1	100.00%	1.0
Arc Warden	4	8.16%	17.24	40.23	0	0.00%	0.0	4	25.00%	4.0
Skywrath Mage	3	6.12%	16.09	39.08	1	0.00%	0.1	2	50.00%	2.0
Chen	4	8.16%	14.94	44.83	1	0.00%	0.1	3	33.33%	3.0
Medusa	3	6.12%	13.79	82.76	3	0.00%	0.4	0	0.00%	0.0
Death Prophet	1	2.04%	12.64	10.34	0	0.00%	0.0	1	0.00%	1.0
Lich	2	4.08%	11.49	52.87	2	0.00%	0.3	0	0.00%	0.0
Slark	1	2.04%	10.34	32.18	1	0.00%	0.1	0	0.00%	0.0
Riki	4	8.16%	9.20	87.36	3	0.00%	0.4	1	0.00%	1.0
Dark Seer	1	2.04%	8.05	32.18	1	0.00%	0.1	0	0.00%	0.0
Ogre Magi	2	4.08%	6.90	52.87	2	0.00%	0.3	0	0.00%	0.0
Luna	1	2.04%	5.75	32.18	1	0.00%	0.1	0	0.00%	0.0
Brewmaster	1	2.04%	5.75	32.18	1	0.00%	0.1	0	0.00%	0.0
Axe	1	2.04%	5.75	32.18	1	0.00%	0.1	0	0.00%	0.0
Warlock	1	2.04%	5.75	32.18	1	0.00%	0.1	0	0.00%	0.0
Night Stalker	2	4.08%	1.15	52.87	2	0.00%	0.3	0	0.00%	0.0