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): 5 - Matches: 45

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

Balance rank	Winrate	Pickrate	Contest Rate
60.3	80.8	42.7	33.9

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Centaur Warrunner	18	40.00%	100.00	18.95	11	90.91%	2.8	7	57.14%	1.4
Timbersaw	38	84.44%	98.95	62.11	10	70.00%	2.5	28	60.71%	5.6
Chen	42	93.33%	97.89	73.68	7	71.43%	1.8	35	57.14%	7.0
Techies	31	68.89%	96.84	61.05	14	64.29%	3.5	17	58.82%	3.4
Vengeful Spirit	30	66.67%	95.79	63.16	17	64.71%	4.3	13	53.85%	2.6
Lifestealer	17	37.78%	94.74	31.58	8	87.50%	2.0	9	44.44%	1.8
Batrider	31	68.89%	93.68	72.63	11	54.55%	2.8	20	60.00%	4.0
Puck	29	64.44%	92.63	65.26	9	66.67%	2.3	20	50.00%	4.0
Doom	38	84.44%	91.58	90.53	7	28.57%	1.8	31	61.29%	6.2
Lion	29	64.44%	90.53	76.84	21	52.38%	5.3	8	62.50%	1.6
Naga Siren	26	57.78%	89.47	69.47	12	58.33%	3.0	14	50.00%	2.8
Nature's Prophet	44	97.78%	88.42	97.89	5	40.00%	1.3	39	48.72%	7.8
Kunkka	7	15.56%	87.37	10.53	4	75.00%	1.0	3	100.00%	0.6
Ancient Apparition	4	8.89%	86.32	2.11	2	100.00%	0.5	2	100.00%	0.4
Mars	32	71.11%	85.26	86.32	22	50.00%	5.5	10	50.00%	2.0
Phoenix	33	73.33%	84.21	87.37	7	57.14%	1.8	26	46.15%	5.2
Grimstroke	19	42.22%	83.16	53.68	5	40.00%	1.3	14	71.43%	2.8
Morphling	25	55.56%	82.11	77.89	12	50.00%	3.0	13	53.85%	2.6
Snapfire	3	6.67%	81.05	3.16	3	100.00%	0.8	0	0.00%	0.0
Meepo	29	64.44%	80.00	85.26	2	50.00%	0.5	27	48.15%	5.4
Brewmaster	13	28.89%	78.95	45.26	5	40.00%	1.3	8	87.50%	1.6
Faceless Void	24	53.33%	77.89	83.16	7	57.14%	1.8	17	41.18%	3.4
Keeper of the Light	20	44.44%	76.84	74.74	8	62.50%	2.0	12	33.33%	2.4
Templar Assassin	19	42.22%	75.79	71.58	9	44.44%	2.3	10	60.00%	2.0
Gyrocopter	8	17.78%	74.74	34.74	8	62.50%	2.0	0	0.00%	0.0
Beastmaster	10	22.22%	73.68	38.95	5	60.00%	1.3	5	60.00%	1.0
Zeus	10	22.22%	73.68	38.95	5	60.00%	1.3	5	60.00%	1.0
Ember Spirit	33	73.33%	71.58	98.95	13	30.77%	3.3	20	50.00%	4.0
Pangolier	20	44.44%	70.53	81.05	8	37.50%	2.0	12	58.33%	2.4
Outworld Destroyer	9	20.00%	69.47	32.63	4	50.00%	1.0	5	80.00%	1.0
Abaddon	8	17.78%	68.42	36.84	7	57.14%	1.8	1	100.00%	0.2
Pudge	8	17.78%	67.37	28.42	5	60.00%	1.3	3	66.67%	0.6
Shadow Demon	8	17.78%	67.37	28.42	5	60.00%	1.3	3	66.67%	0.6
Invoker	10	22.22%	65.26	44.21	4	75.00%	1.0	6	33.33%	1.2
Pugna	18	40.00%	64.21	84.21	6	33.33%	1.5	12	50.00%	2.4
Windranger	13	28.89%	63.16	66.32	9	44.44%	2.3	4	50.00%	0.8
Primal Beast	14	31.11%	62.11	67.37	6	33.33%	1.5	8	62.50%	1.6
Slark	3	6.67%	61.05	4.21	0	0.00%	0.0	3	100.00%	0.6
Magnus	23	51.11%	60.00	95.79	7	28.57%	1.8	16	43.75%	3.2
Undying	4	8.89%	58.95	11.58	3	66.67%	0.8	1	100.00%	0.2
Jakiro	7	15.56%	57.89	43.16	6	50.00%	1.5	1	100.00%	0.2
Bounty Hunter	9	20.00%	56.84	55.79	8	50.00%	2.0	1	0.00%	0.2
Storm Spirit	9	20.00%	55.79	50.53	3	33.33%	0.8	6	66.67%	1.2
Viper	9	20.00%	54.74	51.58	3	66.67%	0.8	6	33.33%	1.2
Arc Warden	2	4.44%	53.68	5.26	1	100.00%	0.3	1	100.00%	0.2
Luna	20	44.44%	52.63	96.84	9	44.44%	2.3	11	18.18%	2.2
Dark Willow	13	28.89%	51.58	82.11	10	30.00%	2.5	3	100.00%	0.6
Queen of Pain	9	20.00%	50.53	49.47	1	0.00%	0.3	8	62.50%	1.6
Tusk	9	20.00%	49.47	60.00	7	42.86%	1.8	2	50.00%	0.4
Troll Warlord	10	22.22%	48.42	64.21	7	42.86%	1.8	3	33.33%	0.6
Marci	4	8.89%	47.37	21.05	3	66.67%	0.8	1	0.00%	0.2
Clockwerk	5	11.11%	46.32	30.53	3	33.33%	0.8	2	100.00%	0.4
Spectre	5	11.11%	45.26	33.68	3	66.67%	0.8	2	0.00%	0.4
Night Stalker	4	8.89%	44.21	17.89	1	100.00%	0.3	3	33.33%	0.6
Medusa	4	8.89%	44.21	17.89	1	100.00%	0.3	3	33.33%	0.6
Lina	18	40.00%	42.11	100.00	6	33.33%	1.5	12	16.67%	2.4
Earthshaker	1	2.22%	41.05	8.42	1	100.00%	0.3	0	0.00%	0.0
Elder Titan	1	2.22%	41.05	8.42	1	100.00%	0.3	0	0.00%	0.0
Huskar	7	15.56%	38.95	48.42	0	0.00%	0.0	7	42.86%	1.4
Clinkz	4	8.89%	37.89	23.16	2	50.00%	0.5	2	50.00%	0.4
Tidehunter	4	8.89%	37.89	23.16	2	50.00%	0.5	2	50.00%	0.4
Anti-Mage	5	11.11%	35.79	40.00	2	50.00%	0.5	3	33.33%	0.6
Omniknight	2	4.44%	34.74	9.47	1	100.00%	0.3	1	0.00%	0.2
Dragon Knight	9	20.00%	33.68	89.47	6	33.33%	1.5	3	0.00%	0.6
Lone Druid	10	22.22%	32.63	92.63	2	50.00%	0.5	8	12.50%	1.6
Winter Wyvern	4	8.89%	31.58	29.47	1	0.00%	0.3	3	66.67%	0.6
Tiny	2	4.44%	30.53	15.79	2	50.00%	0.5	0	0.00%	0.0
Visage	1	2.22%	29.47	6.32	0	0.00%	0.0	1	100.00%	0.2
Ursa	1	2.22%	29.47	1.05	0	0.00%	0.0	1	100.00%	0.2
Rubick	8	17.78%	27.37	91.58	5	20.00%	1.3	3	33.33%	0.6
Dark Seer	4	8.89%	26.32	46.32	2	0.00%	0.5	2	100.00%	0.4
Weaver	4	8.89%	25.26	47.37	2	50.00%	0.5	2	0.00%	0.4
Bloodseeker	7	15.56%	24.21	68.42	1	0.00%	0.3	6	33.33%	1.2
Spirit Breaker	5	11.11%	23.16	54.74	2	50.00%	0.5	3	0.00%	0.6
Mirana	3	6.67%	22.11	42.11	3	33.33%	0.8	0	0.00%	0.0
Monkey King	3	6.67%	22.11	42.11	3	33.33%	0.8	0	0.00%	0.0
Enchantress	7	15.56%	20.00	78.95	2	0.00%	0.5	5	40.00%	1.0
Broodmother	7	15.56%	18.95	80.00	2	50.00%	0.5	5	0.00%	1.0
Alchemist	5	11.11%	17.89	70.53	4	25.00%	1.0	1	0.00%	0.2
Dawnbreaker	2	4.44%	16.84	20.00	1	0.00%	0.3	1	100.00%	0.2
Razor	4	8.89%	15.79	52.63	1	0.00%	0.3	3	33.33%	0.6
Death Prophet	7	15.56%	14.74	93.68	2	0.00%	0.5	5	20.00%	1.0
Necrophos	1	2.22%	13.68	14.74	0	0.00%	0.0	1	0.00%	0.2
Crystal Maiden	1	2.22%	12.63	26.32	1	0.00%	0.3	0	0.00%	0.0
Drow Ranger	1	2.22%	12.63	26.32	1	0.00%	0.3	0	0.00%	0.0
Io	1	2.22%	10.53	14.74	0	0.00%	0.0	1	0.00%	0.2
Juggernaut	2	4.44%	9.47	58.95	2	0.00%	0.5	0	0.00%	0.0
Nyx Assassin	1	2.22%	8.42	26.32	1	0.00%	0.3	0	0.00%	0.0
Phantom Lancer	2	4.44%	7.37	58.95	2	0.00%	0.5	0	0.00%	0.0
Void Spirit	2	4.44%	7.37	58.95	2	0.00%	0.5	0	0.00%	0.0
Lycan	2	4.44%	5.26	35.79	0	0.00%	0.0	2	0.00%	0.4
Silencer	3	6.67%	4.21	75.79	2	0.00%	0.5	1	0.00%	0.2
Treant Protector	4	8.89%	3.16	88.42	2	0.00%	0.5	2	0.00%	0.4
Slardar	5	11.11%	2.11	94.74	2	0.00%	0.5	3	0.00%	0.6
Terrorblade	1	2.22%	1.05	14.74	0	0.00%	0.0	1	0.00%	0.2