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): 7 - Matches: 45

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

Balance rank	Winrate	Pickrate	Contest Rate
56.9	79.4	33.1	37.1

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Nature's Prophet	43	95.56%	100.00	80.68	6	66.67%	1.5	37	56.76%	5.3
Terrorblade	18	40.00%	98.86	31.82	9	88.89%	2.3	9	44.44%	1.3
Earthshaker	31	68.89%	97.73	61.36	8	75.00%	2.0	23	56.52%	3.3
Underlord	10	22.22%	96.59	9.09	4	100.00%	1.0	6	66.67%	0.9
Gyrocopter	39	86.67%	95.45	78.41	15	46.67%	3.8	24	70.83%	3.4
Elder Titan	17	37.78%	94.32	35.23	11	81.82%	2.8	6	33.33%	0.9
Primal Beast	28	62.22%	93.18	63.64	6	83.33%	1.5	22	50.00%	3.1
Invoker	37	82.22%	92.05	81.82	13	61.54%	3.3	24	50.00%	3.4
Treant Protector	25	55.56%	90.91	65.91	12	58.33%	3.0	13	61.54%	1.9
Batrider	28	62.22%	89.77	71.59	12	66.67%	3.0	16	43.75%	2.3
Clockwerk	21	46.67%	88.64	57.95	14	57.14%	3.5	7	71.43%	1.0
Vengeful Spirit	39	86.67%	87.50	88.64	13	30.77%	3.3	26	69.23%	3.7
Sven	24	53.33%	86.36	68.18	12	66.67%	3.0	12	41.67%	1.7
Dark Seer	27	60.00%	85.23	75.00	12	50.00%	3.0	15	60.00%	2.1
Puck	21	46.67%	84.09	64.77	10	70.00%	2.5	11	36.36%	1.6
Lion	13	28.89%	82.95	40.91	9	55.56%	2.3	4	100.00%	0.6
Night Stalker	14	31.11%	81.82	42.05	5	60.00%	1.3	9	66.67%	1.3
Monkey King	10	22.22%	80.68	19.32	1	0.00%	0.3	9	88.89%	1.3
Brewmaster	32	71.11%	79.55	87.50	7	57.14%	1.8	25	44.00%	3.6
Slark	15	33.33%	78.41	43.18	1	100.00%	0.3	14	57.14%	2.0
Bloodseeker	15	33.33%	77.27	51.14	5	60.00%	1.3	10	60.00%	1.4
Timbersaw	13	28.89%	76.14	36.36	1	100.00%	0.3	12	58.33%	1.7
Naga Siren	23	51.11%	75.00	73.86	8	62.50%	2.0	15	40.00%	2.1
Razor	17	37.78%	73.86	55.68	6	50.00%	1.5	11	63.64%	1.6
Ancient Apparition	16	35.56%	72.73	54.55	7	57.14%	1.8	9	55.56%	1.3
Rubick	30	66.67%	71.59	92.05	19	42.11%	4.8	11	54.55%	1.6
Venomancer	3	6.67%	70.45	1.14	2	100.00%	0.5	1	100.00%	0.1
Beastmaster	16	35.56%	69.32	59.09	6	50.00%	1.5	10	60.00%	1.4
Warlock	10	22.22%	68.18	44.32	7	57.14%	1.8	3	66.67%	0.4
Templar Assassin	19	42.22%	67.05	76.14	8	50.00%	2.0	11	45.45%	1.6
Legion Commander	10	22.22%	65.91	34.09	3	66.67%	0.8	7	57.14%	1.0
Queen of Pain	14	31.11%	64.77	62.50	7	57.14%	1.8	7	42.86%	1.0
Ember Spirit	28	62.22%	63.64	94.32	16	37.50%	4.0	12	50.00%	1.7
Doom	37	82.22%	62.50	97.73	13	38.46%	3.3	24	33.33%	3.4
Phoenix	20	44.44%	61.36	85.23	13	46.15%	3.3	7	28.57%	1.0
Tidehunter	6	13.33%	60.23	20.45	3	66.67%	0.8	3	66.67%	0.4
Keeper of the Light	15	33.33%	59.09	72.73	7	42.86%	1.8	8	50.00%	1.1
Drow Ranger	11	24.44%	57.95	53.41	5	40.00%	1.3	6	66.67%	0.9
Outworld Destroyer	3	6.67%	56.82	6.82	2	100.00%	0.5	1	0.00%	0.1
Dark Willow	17	37.78%	55.68	93.18	14	35.71%	3.5	3	33.33%	0.4
Broodmother	9	20.00%	54.55	47.73	1	100.00%	0.3	8	37.50%	1.1
Earth Spirit	16	35.56%	53.41	89.77	9	44.44%	2.3	7	14.29%	1.0
Chen	7	15.56%	52.27	23.86	0	0.00%	0.0	7	57.14%	1.0
Phantom Lancer	4	8.89%	51.14	13.64	2	50.00%	0.5	2	100.00%	0.3
Disruptor	4	8.89%	50.00	14.77	2	100.00%	0.5	2	0.00%	0.3
Dawnbreaker	19	42.22%	48.86	95.45	12	33.33%	3.0	7	28.57%	1.0
Morphling	12	26.67%	47.73	77.27	6	33.33%	1.5	6	50.00%	0.9
Enchantress	10	22.22%	46.59	67.05	4	50.00%	1.0	6	33.33%	0.9
Undying	6	13.33%	45.45	38.64	4	50.00%	1.0	2	50.00%	0.3
Medusa	12	26.67%	44.32	79.55	4	50.00%	1.0	8	25.00%	1.1
Lifestealer	3	6.67%	43.18	7.95	1	100.00%	0.3	2	50.00%	0.3
Grimstroke	4	8.89%	42.05	22.73	3	66.67%	0.8	1	0.00%	0.1
Silencer	9	20.00%	40.91	70.45	4	25.00%	1.0	5	60.00%	0.7
Lycan	6	13.33%	39.77	46.59	3	33.33%	0.8	3	66.67%	0.4
Snapfire	1	2.22%	38.64	4.55	1	100.00%	0.3	0	0.00%	0.0
Wraith King	1	2.22%	38.64	4.55	1	100.00%	0.3	0	0.00%	0.0
Clinkz	1	2.22%	38.64	4.55	1	100.00%	0.3	0	0.00%	0.0
Visage	5	11.11%	35.23	37.50	2	50.00%	0.5	3	33.33%	0.4
Troll Warlord	5	11.11%	34.09	52.27	3	33.33%	0.8	2	50.00%	0.3
Viper	4	8.89%	32.95	21.59	0	0.00%	0.0	4	50.00%	0.6
Dragon Knight	6	13.33%	31.82	60.23	3	33.33%	0.8	3	33.33%	0.4
Mars	8	17.78%	30.68	84.09	4	25.00%	1.0	4	25.00%	0.6
Huskar	4	8.89%	29.55	32.95	1	0.00%	0.3	3	66.67%	0.4
Marci	2	4.44%	28.41	18.18	2	50.00%	0.5	0	0.00%	0.0
Luna	2	4.44%	28.41	18.18	2	50.00%	0.5	0	0.00%	0.0
Ursa	1	2.22%	26.14	5.68	0	0.00%	0.0	1	100.00%	0.1
Faceless Void	16	35.56%	25.00	98.86	3	0.00%	0.8	13	23.08%	1.9
Mirana	4	8.89%	23.86	45.45	2	50.00%	0.5	2	0.00%	0.3
Storm Spirit	11	24.44%	22.73	96.59	7	14.29%	1.8	4	25.00%	0.6
Enigma	3	6.67%	21.59	39.77	3	33.33%	0.8	0	0.00%	0.0
Io	8	17.78%	20.45	82.95	1	0.00%	0.3	7	28.57%	1.0
Spectre	5	11.11%	19.32	69.32	3	33.33%	0.8	2	0.00%	0.3
Tiny	2	4.44%	18.18	12.50	0	0.00%	0.0	2	50.00%	0.3
Anti-Mage	2	4.44%	18.18	12.50	0	0.00%	0.0	2	50.00%	0.3
Leshrac	2	4.44%	18.18	12.50	0	0.00%	0.0	2	50.00%	0.3
Pangolier	13	28.89%	14.77	100.00	7	14.29%	1.8	6	0.00%	0.9
Phantom Assassin	6	13.33%	13.64	90.91	3	0.00%	0.8	3	33.33%	0.4
Skywrath Mage	5	11.11%	12.50	86.36	4	0.00%	1.0	1	100.00%	0.1
Shadow Fiend	1	2.22%	11.36	30.68	1	0.00%	0.3	0	0.00%	0.0
Sand King	1	2.22%	11.36	30.68	1	0.00%	0.3	0	0.00%	0.0
Riki	1	2.22%	11.36	30.68	1	0.00%	0.3	0	0.00%	0.0
Spirit Breaker	1	2.22%	11.36	30.68	1	0.00%	0.3	0	0.00%	0.0
Dazzle	1	2.22%	11.36	30.68	1	0.00%	0.3	0	0.00%	0.0
Tusk	1	2.22%	11.36	30.68	1	0.00%	0.3	0	0.00%	0.0
Witch Doctor	2	4.44%	4.55	50.00	1	0.00%	0.3	1	0.00%	0.1
Alchemist	2	4.44%	4.55	50.00	1	0.00%	0.3	1	0.00%	0.1
Axe	2	4.44%	2.27	56.82	2	0.00%	0.5	0	0.00%	0.0
Meepo	1	2.22%	1.14	18.18	0	0.00%	0.0	1	0.00%	0.1