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): 1 - Matches: 14

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

Balance rank	Winrate	Pickrate	Contest Rate
36.7	47.2	27.2	24.6

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Sand King	14	100.00%	100.00	55.93	6	66.67%	1.5	8	75.00%	8.0
Ancient Apparition	11	78.57%	98.31	50.85	6	66.67%	1.5	5	80.00%	5.0
Io	12	85.71%	96.61	62.71	5	80.00%	1.3	7	42.86%	7.0
Luna	3	21.43%	94.92	3.39	3	100.00%	0.8	0	0.00%	0.0
Witch Doctor	7	50.00%	93.22	28.81	4	75.00%	1.0	3	66.67%	3.0
Gyrocopter	13	92.86%	91.53	77.97	5	60.00%	1.3	8	50.00%	8.0
Night Stalker	5	35.71%	89.83	22.03	4	75.00%	1.0	1	100.00%	1.0
Tiny	12	85.71%	88.14	72.88	6	50.00%	1.5	6	66.67%	6.0
Abaddon	3	21.43%	86.44	5.08	1	100.00%	0.3	2	100.00%	2.0
Bounty Hunter	8	57.14%	84.75	52.54	3	66.67%	0.8	5	60.00%	5.0
Viper	7	50.00%	83.05	35.59	2	50.00%	0.5	5	80.00%	5.0
Omniknight	13	92.86%	81.36	86.44	3	33.33%	0.8	10	60.00%	10.0
Lifestealer	11	78.57%	79.66	81.36	7	42.86%	1.8	4	75.00%	4.0
Broodmother	2	14.29%	77.97	6.78	2	100.00%	0.5	0	0.00%	0.0
Tidehunter	4	28.57%	76.27	16.95	1	100.00%	0.3	3	66.67%	3.0
Enchantress	4	28.57%	76.27	16.95	1	100.00%	0.3	3	66.67%	3.0
Razor	10	71.43%	72.88	74.58	2	0.00%	0.5	8	75.00%	8.0
Terrorblade	12	85.71%	71.19	91.53	6	33.33%	1.5	6	66.67%	6.0
Death Prophet	12	85.71%	69.49	93.22	6	50.00%	1.5	6	33.33%	6.0
Queen of Pain	3	21.43%	67.80	13.56	2	100.00%	0.5	1	0.00%	1.0
Rubick	5	35.71%	66.10	37.29	2	50.00%	0.5	3	66.67%	3.0
Dark Willow	13	92.86%	64.41	100.00	2	0.00%	0.5	11	45.45%	11.0
Pugna	2	14.29%	62.71	8.47	0	0.00%	0.0	2	100.00%	2.0
Underlord	4	28.57%	61.02	33.90	3	66.67%	0.8	1	0.00%	1.0
Disruptor	7	50.00%	59.32	79.66	3	33.33%	0.8	4	50.00%	4.0
Chen	11	78.57%	57.63	98.31	2	50.00%	0.5	9	22.22%	9.0
Dragon Knight	4	28.57%	55.93	54.24	4	50.00%	1.0	0	0.00%	0.0
Nature's Prophet	6	42.86%	54.24	66.10	1	100.00%	0.3	5	20.00%	5.0
Outworld Destroyer	7	50.00%	52.54	83.05	1	100.00%	0.3	6	16.67%	6.0
Oracle	1	7.14%	50.85	1.69	1	100.00%	0.3	0	0.00%	0.0
Weaver	1	7.14%	50.85	11.86	1	100.00%	0.3	0	0.00%	0.0
Skywrath Mage	1	7.14%	50.85	11.86	1	100.00%	0.3	0	0.00%	0.0
Elder Titan	5	35.71%	45.76	64.41	2	50.00%	0.5	3	33.33%	3.0
Batrider	6	42.86%	44.07	76.27	2	50.00%	0.5	4	25.00%	4.0
Bane	6	42.86%	42.37	84.75	6	33.33%	1.5	0	0.00%	0.0
Faceless Void	5	35.71%	40.68	67.80	3	33.33%	0.8	2	50.00%	2.0
Venomancer	2	14.29%	38.98	18.64	1	100.00%	0.3	1	0.00%	1.0
Visage	3	21.43%	37.29	30.51	1	100.00%	0.3	2	0.00%	2.0
Tusk	7	50.00%	35.59	94.92	5	20.00%	1.3	2	50.00%	2.0
Shadow Fiend	5	35.71%	33.90	71.19	1	0.00%	0.3	4	50.00%	4.0
Lina	2	14.29%	32.20	27.12	2	50.00%	0.5	0	0.00%	0.0
Juggernaut	2	14.29%	32.20	27.12	2	50.00%	0.5	0	0.00%	0.0
Earth Spirit	3	21.43%	28.81	61.02	3	33.33%	0.8	0	0.00%	0.0
Beastmaster	5	35.71%	27.12	89.83	3	33.33%	0.8	2	0.00%	2.0
Morphling	2	14.29%	25.42	20.34	0	0.00%	0.0	2	50.00%	2.0
Phantom Lancer	3	21.43%	23.73	49.15	0	0.00%	0.0	3	33.33%	3.0
Brewmaster	2	14.29%	22.03	32.20	1	0.00%	0.3	1	100.00%	1.0
Puck	4	28.57%	20.34	88.14	2	0.00%	0.5	2	50.00%	2.0
Naga Siren	5	35.71%	18.64	96.61	3	0.00%	0.8	2	50.00%	2.0
Enigma	2	14.29%	16.95	69.49	1	0.00%	0.3	1	0.00%	1.0
Medusa	2	14.29%	15.25	59.32	0	0.00%	0.0	2	0.00%	2.0
Zeus	1	7.14%	13.56	47.46	1	0.00%	0.3	0	0.00%	0.0
Phantom Assassin	1	7.14%	13.56	47.46	1	0.00%	0.3	0	0.00%	0.0
Dazzle	1	7.14%	13.56	47.46	1	0.00%	0.3	0	0.00%	0.0
Timbersaw	1	7.14%	13.56	47.46	1	0.00%	0.3	0	0.00%	0.0
Tinker	2	14.29%	6.78	59.32	0	0.00%	0.0	2	0.00%	2.0
Kunkka	1	7.14%	5.08	47.46	1	0.00%	0.3	0	0.00%	0.0
Warlock	1	7.14%	5.08	47.46	1	0.00%	0.3	0	0.00%	0.0
Keeper of the Light	1	7.14%	1.69	27.12	0	0.00%	0.0	1	0.00%	1.0