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): 4 - Matches: 32

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

Balance rank	Winrate	Pickrate	Contest Rate
52.6	78.6	22.6	34.7

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Omniknight	13	40.63%	100.00	28.24	4	100.00%	1.0	9	66.67%	2.3
Disruptor	18	56.25%	98.82	50.59	11	63.64%	2.8	7	85.71%	1.8
Tusk	17	53.13%	97.65	45.88	6	66.67%	1.5	11	72.73%	2.8
Kunkka	30	93.75%	96.47	80.00	5	60.00%	1.3	25	56.00%	6.3
Enchantress	6	18.75%	95.29	18.82	4	100.00%	1.0	2	50.00%	0.5
Grimstroke	5	15.63%	94.12	1.18	1	100.00%	0.3	4	100.00%	1.0
Chen	30	93.75%	92.94	85.88	3	100.00%	0.8	27	44.44%	6.8
Lifestealer	13	40.63%	91.76	42.35	5	60.00%	1.3	8	75.00%	2.0
Luna	6	18.75%	90.59	21.18	5	80.00%	1.3	1	100.00%	0.3
Shadow Demon	29	90.63%	89.41	89.41	7	42.86%	1.8	22	54.55%	5.5
Slardar	13	40.63%	88.24	47.06	4	50.00%	1.0	9	77.78%	2.3
Timbersaw	27	84.38%	87.06	88.24	9	55.56%	2.3	18	44.44%	4.5
Doom	10	31.25%	85.88	32.94	3	66.67%	0.8	7	71.43%	1.8
Faceless Void	11	34.38%	84.71	41.18	4	75.00%	1.0	7	57.14%	1.8
Queen of Pain	12	37.50%	83.53	51.76	9	66.67%	2.3	3	33.33%	0.8
Centaur Warrunner	16	50.00%	82.35	64.71	9	55.56%	2.3	7	57.14%	1.8
Lion	18	56.25%	81.18	76.47	14	57.14%	3.5	4	25.00%	1.0
Zeus	11	34.38%	80.00	48.24	5	60.00%	1.3	6	66.67%	1.5
Leshrac	10	31.25%	78.82	44.71	6	66.67%	1.5	4	50.00%	1.0
Tiny	30	93.75%	77.65	95.29	14	42.86%	3.5	16	37.50%	4.0
Dragon Knight	28	87.50%	76.47	92.94	6	50.00%	1.5	22	36.36%	5.5
Primal Beast	20	62.50%	75.29	87.06	8	50.00%	2.0	12	41.67%	3.0
Death Prophet	9	28.13%	74.12	49.41	6	66.67%	1.5	3	33.33%	0.8
Lina	11	34.38%	72.94	55.29	5	40.00%	1.3	6	83.33%	1.5
Elder Titan	6	18.75%	71.76	30.59	4	75.00%	1.0	2	50.00%	0.5
Gyrocopter	15	46.88%	70.59	75.29	9	55.56%	2.3	6	33.33%	1.5
Terrorblade	14	43.75%	69.41	71.76	10	50.00%	2.5	4	50.00%	1.0
Razor	28	87.50%	68.24	98.82	17	35.29%	4.3	11	45.45%	2.8
Rubick	7	21.88%	67.06	40.00	6	66.67%	1.5	1	0.00%	0.3
Weaver	12	37.50%	65.88	67.06	8	50.00%	2.0	4	50.00%	1.0
Mirana	10	31.25%	64.71	58.82	5	60.00%	1.3	5	40.00%	1.3
Sven	2	6.25%	63.53	16.47	2	100.00%	0.5	0	0.00%	0.0
Pangolier	26	81.25%	62.35	97.65	4	25.00%	1.0	22	40.91%	5.5
Clockwerk	9	28.13%	61.18	54.12	4	25.00%	1.0	5	100.00%	1.3
Naga Siren	15	46.88%	60.00	78.82	3	33.33%	0.8	12	50.00%	3.0
Magnus	13	40.63%	58.82	74.12	4	75.00%	1.0	9	22.22%	2.3
Slark	4	12.50%	57.65	24.71	3	66.67%	0.8	1	100.00%	0.3
Keeper of the Light	22	68.75%	56.47	94.12	4	25.00%	1.0	18	38.89%	4.5
Shadow Shaman	9	28.13%	55.29	62.35	8	50.00%	2.0	1	0.00%	0.3
Puck	18	56.25%	54.12	91.76	1	0.00%	0.3	17	41.18%	4.3
Batrider	13	40.63%	52.94	83.53	7	28.57%	1.8	6	66.67%	1.5
Enigma	11	34.38%	51.76	70.59	1	0.00%	0.3	10	50.00%	2.5
Outworld Destroyer	2	6.25%	50.59	2.35	0	0.00%	0.0	2	100.00%	0.5
Ancient Apparition	2	6.25%	50.59	15.29	0	0.00%	0.0	2	100.00%	0.5
Viper	2	6.25%	50.59	15.29	0	0.00%	0.0	2	100.00%	0.5
Techies	4	12.50%	47.06	38.82	4	50.00%	1.0	0	0.00%	0.0
Bristleback	3	9.38%	45.88	27.06	2	50.00%	0.5	1	100.00%	0.3
Alchemist	3	9.38%	45.88	27.06	2	50.00%	0.5	1	100.00%	0.3
Ember Spirit	9	28.13%	43.53	82.35	6	33.33%	1.5	3	33.33%	0.8
Snapfire	1	3.13%	42.35	12.94	1	100.00%	0.3	0	0.00%	0.0
Axe	1	3.13%	42.35	12.94	1	100.00%	0.3	0	0.00%	0.0
Abaddon	1	3.13%	42.35	9.41	1	100.00%	0.3	0	0.00%	0.0
Ursa	1	3.13%	42.35	9.41	1	100.00%	0.3	0	0.00%	0.0
Huskar	1	3.13%	42.35	9.41	1	100.00%	0.3	0	0.00%	0.0
Nyx Assassin	1	3.13%	42.35	9.41	1	100.00%	0.3	0	0.00%	0.0
Meepo	3	9.38%	35.29	20.00	0	0.00%	0.0	3	66.67%	0.8
Crystal Maiden	7	21.88%	34.12	77.65	5	40.00%	1.3	2	0.00%	0.5
Templar Assassin	13	40.63%	32.94	96.47	8	12.50%	2.0	5	60.00%	1.3
Windranger	7	21.88%	31.76	69.41	2	0.00%	0.5	5	60.00%	1.3
Hoodwink	5	15.63%	30.59	57.65	3	33.33%	0.8	2	50.00%	0.5
Morphling	6	18.75%	29.41	65.88	3	33.33%	0.8	3	33.33%	0.8
Medusa	1	3.13%	28.24	4.71	0	0.00%	0.0	1	100.00%	0.3
Nature's Prophet	1	3.13%	28.24	17.65	0	0.00%	0.0	1	100.00%	0.3
Bloodseeker	1	3.13%	28.24	10.59	0	0.00%	0.0	1	100.00%	0.3
Anti-Mage	1	3.13%	28.24	4.71	0	0.00%	0.0	1	100.00%	0.3
Storm Spirit	7	21.88%	23.53	84.71	2	0.00%	0.5	5	40.00%	1.3
Oracle	4	12.50%	22.35	61.18	3	33.33%	0.8	1	0.00%	0.3
Mars	5	15.63%	21.18	72.94	3	33.33%	0.8	2	0.00%	0.5
Io	11	34.38%	20.00	100.00	2	0.00%	0.5	9	22.22%	2.3
Vengeful Spirit	4	12.50%	18.82	68.24	4	25.00%	1.0	0	0.00%	0.0
Dark Seer	2	6.25%	17.65	23.53	0	0.00%	0.0	2	50.00%	0.5
Tidehunter	2	6.25%	17.65	23.53	0	0.00%	0.0	2	50.00%	0.5
Beastmaster	4	12.50%	15.29	52.94	0	0.00%	0.0	4	25.00%	1.0
Monkey King	2	6.25%	14.12	31.76	1	0.00%	0.3	1	100.00%	0.3
Brewmaster	7	21.88%	12.94	90.59	0	0.00%	0.0	7	14.29%	1.8
Clinkz	3	9.38%	11.76	60.00	2	0.00%	0.5	1	100.00%	0.3
Dawnbreaker	1	3.13%	10.59	37.65	1	0.00%	0.3	0	0.00%	0.0
Muerta	1	3.13%	10.59	37.65	1	0.00%	0.3	0	0.00%	0.0
Phoenix	2	6.25%	8.24	63.53	2	0.00%	0.5	0	0.00%	0.0
Pudge	2	6.25%	7.06	56.47	1	0.00%	0.3	1	0.00%	0.3
Ogre Magi	1	3.13%	5.88	37.65	1	0.00%	0.3	0	0.00%	0.0
Marci	3	9.38%	4.71	81.18	2	0.00%	0.5	1	0.00%	0.3
Night Stalker	2	6.25%	3.53	43.53	0	0.00%	0.0	2	0.00%	0.5
Pugna	1	3.13%	2.35	37.65	1	0.00%	0.3	0	0.00%	0.0
Troll Warlord	1	3.13%	1.18	30.59	0	0.00%	0.0	1	0.00%	0.3