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): 5 - Median hero bans (mb): 7 - Matches: 55

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

Balance rank	Winrate	Pickrate	Contest Rate
58.6	75.0	44.2	38.3

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Timbersaw	49	89.09%	100.00	62.50	11	63.64%	2.2	38	65.79%	5.4
Abaddon	21	38.18%	98.96	39.58	15	73.33%	3.0	6	66.67%	0.9
Lina	23	41.82%	97.92	42.71	11	72.73%	2.2	12	66.67%	1.7
Bristleback	8	14.55%	96.88	12.50	3	100.00%	0.6	5	80.00%	0.7
Broodmother	40	72.73%	95.83	68.75	9	66.67%	1.8	31	51.61%	4.4
Ancient Apparition	35	63.64%	94.79	65.63	8	62.50%	1.6	27	55.56%	3.9
Kunkka	29	52.73%	93.75	60.42	5	40.00%	1.0	24	66.67%	3.4
Zeus	4	7.27%	92.71	11.46	4	100.00%	0.8	0	0.00%	0.0
Templar Assassin	38	69.09%	91.67	72.92	10	50.00%	2.0	28	57.14%	4.0
Nyx Assassin	43	78.18%	90.63	87.50	21	57.14%	4.2	22	40.91%	3.1
Riki	17	30.91%	89.58	40.63	4	75.00%	0.8	13	61.54%	1.9
Arc Warden	4	7.27%	88.54	10.42	3	100.00%	0.6	1	100.00%	0.1
Dragon Knight	34	61.82%	87.50	76.04	16	43.75%	3.2	18	66.67%	2.6
Winter Wyvern	36	65.45%	86.46	81.25	15	66.67%	3.0	21	28.57%	3.0
Earth Spirit	10	18.18%	85.42	23.96	10	70.00%	2.0	0	0.00%	0.0
Nature's Prophet	10	18.18%	84.38	20.83	5	100.00%	1.0	5	20.00%	0.7
Dark Seer	17	30.91%	83.33	47.92	7	85.71%	1.4	10	30.00%	1.4
Viper	39	70.91%	82.29	89.58	10	60.00%	2.0	29	41.38%	4.1
Axe	27	49.09%	81.25	66.67	16	56.25%	3.2	11	45.45%	1.6
Spectre	32	58.18%	80.21	75.00	7	42.86%	1.4	25	56.00%	3.6
Brewmaster	13	23.64%	79.17	36.46	5	60.00%	1.0	8	75.00%	1.1
Clockwerk	14	25.45%	78.13	44.79	12	58.33%	2.4	2	100.00%	0.3
Puck	44	80.00%	77.08	98.96	13	38.46%	2.6	31	48.39%	4.4
Dark Willow	3	5.45%	76.04	7.29	3	100.00%	0.6	0	0.00%	0.0
Hoodwink	31	56.36%	75.00	88.54	21	47.62%	4.2	10	40.00%	1.4
Bloodseeker	7	12.73%	73.96	16.67	2	100.00%	0.4	5	60.00%	0.7
Sand King	16	29.09%	72.92	51.04	9	55.56%	1.8	7	57.14%	1.0
Invoker	25	45.45%	71.88	67.71	5	60.00%	1.0	20	45.00%	2.9
Doom	13	23.64%	70.83	43.75	4	50.00%	0.8	9	66.67%	1.3
Pangolier	9	16.36%	69.79	34.38	5	60.00%	1.0	4	75.00%	0.6
Slark	4	7.27%	68.75	13.54	3	100.00%	0.6	1	0.00%	0.1
Tiny	16	29.09%	67.71	59.38	9	44.44%	1.8	7	71.43%	1.0
Grimstroke	24	43.64%	66.67	84.38	19	42.11%	3.8	5	60.00%	0.7
Mars	35	63.64%	65.63	100.00	16	31.25%	3.2	19	52.63%	2.7
Luna	30	54.55%	64.58	94.79	9	33.33%	1.8	21	47.62%	3.0
Enchantress	13	23.64%	63.54	55.21	8	50.00%	1.6	5	60.00%	0.7
Lifestealer	18	32.73%	62.50	64.58	5	40.00%	1.0	13	53.85%	1.9
Lion	30	54.55%	61.46	97.92	21	42.86%	4.2	9	22.22%	1.3
Gyrocopter	8	14.55%	60.42	38.54	7	57.14%	1.4	1	100.00%	0.1
Terrorblade	24	43.64%	59.38	86.46	9	44.44%	1.8	15	40.00%	2.1
Tidehunter	20	36.36%	58.33	71.88	7	14.29%	1.4	13	76.92%	1.9
Storm Spirit	20	36.36%	57.29	73.96	7	42.86%	1.4	13	46.15%	1.9
Ursa	22	40.00%	56.25	79.17	4	25.00%	0.8	18	50.00%	2.6
Batrider	13	23.64%	55.21	57.29	5	60.00%	1.0	8	37.50%	1.1
Leshrac	23	41.82%	54.17	90.63	7	42.86%	1.4	16	37.50%	2.3
Elder Titan	2	3.64%	53.13	5.21	2	100.00%	0.4	0	0.00%	0.0
Drow Ranger	8	14.55%	52.08	33.33	2	100.00%	0.4	6	33.33%	0.9
Mirana	18	32.73%	51.04	82.29	14	42.86%	2.8	4	25.00%	0.6
Beastmaster	5	9.09%	50.00	19.79	4	75.00%	0.8	1	0.00%	0.1
Phoenix	17	30.91%	48.96	80.21	13	38.46%	2.6	4	50.00%	0.6
Keeper of the Light	4	7.27%	47.92	17.71	3	66.67%	0.6	1	100.00%	0.1
Phantom Lancer	14	25.45%	46.88	63.54	2	0.00%	0.4	12	58.33%	1.7
Skywrath Mage	5	9.09%	45.83	22.92	5	60.00%	1.0	0	0.00%	0.0
Magnus	21	38.18%	44.79	95.83	10	30.00%	2.0	11	45.45%	1.6
Juggernaut	11	20.00%	43.75	56.25	4	50.00%	0.8	7	42.86%	1.0
Anti-Mage	10	18.18%	42.71	54.17	5	40.00%	1.0	5	60.00%	0.7
Monkey King	4	7.27%	41.67	14.58	0	0.00%	0.0	4	75.00%	0.6
Death Prophet	15	27.27%	40.63	70.83	1	0.00%	0.2	14	42.86%	2.0
Wraith King	15	27.27%	39.58	83.33	5	40.00%	1.0	10	30.00%	1.4
Slardar	5	9.09%	38.54	21.88	2	100.00%	0.4	3	0.00%	0.4
Pugna	8	14.55%	37.50	52.08	4	25.00%	0.8	4	75.00%	0.6
Io	2	3.64%	36.46	2.08	0	0.00%	0.0	2	100.00%	0.3
Ember Spirit	16	29.09%	35.42	96.88	5	20.00%	1.0	11	36.36%	1.6
Faceless Void	14	25.45%	34.38	92.71	7	28.57%	1.4	7	28.57%	1.0
Night Stalker	1	1.82%	33.33	6.25	1	100.00%	0.2	0	0.00%	0.0
Alchemist	1	1.82%	33.33	9.38	1	100.00%	0.2	0	0.00%	0.0
Rubick	1	1.82%	33.33	4.17	1	100.00%	0.2	0	0.00%	0.0
Shadow Shaman	1	1.82%	33.33	9.38	1	100.00%	0.2	0	0.00%	0.0
Lich	1	1.82%	33.33	4.17	1	100.00%	0.2	0	0.00%	0.0
Enigma	1	1.82%	33.33	1.04	1	100.00%	0.2	0	0.00%	0.0
Oracle	13	23.64%	27.08	93.75	6	0.00%	1.2	7	71.43%	1.0
Medusa	13	23.64%	26.04	85.42	1	0.00%	0.2	12	33.33%	1.7
Treant Protector	9	16.36%	25.00	77.08	8	25.00%	1.6	1	100.00%	0.1
Legion Commander	7	12.73%	23.96	50.00	1	0.00%	0.2	6	50.00%	0.9
Morphling	6	10.91%	22.92	48.96	2	50.00%	0.4	4	25.00%	0.6
Windranger	6	10.91%	21.88	61.46	4	25.00%	0.8	2	50.00%	0.3
Naga Siren	2	3.64%	20.83	18.75	2	50.00%	0.4	0	0.00%	0.0
Void Spirit	4	7.27%	19.79	35.42	1	100.00%	0.2	3	0.00%	0.4
Disruptor	3	5.45%	18.75	41.67	3	33.33%	0.6	0	0.00%	0.0
Tusk	4	7.27%	17.71	58.33	4	25.00%	0.8	0	0.00%	0.0
Razor	9	16.36%	16.67	91.67	2	50.00%	0.4	7	0.00%	1.0
Phantom Assassin	2	3.64%	15.63	15.63	0	0.00%	0.0	2	50.00%	0.3
Spirit Breaker	1	1.82%	14.58	32.29	1	0.00%	0.2	0	0.00%	0.0
Shadow Demon	2	3.64%	13.54	37.50	0	0.00%	0.0	2	0.00%	0.3
Crystal Maiden	1	1.82%	12.50	32.29	1	0.00%	0.2	0	0.00%	0.0
Troll Warlord	2	3.64%	11.46	53.13	2	0.00%	0.4	0	0.00%	0.0
Sven	1	1.82%	10.42	32.29	1	0.00%	0.2	0	0.00%	0.0
Chaos Knight	1	1.82%	10.42	32.29	1	0.00%	0.2	0	0.00%	0.0
Vengeful Spirit	2	3.64%	8.33	46.88	1	0.00%	0.2	1	0.00%	0.1
Underlord	1	1.82%	7.29	32.29	1	0.00%	0.2	0	0.00%	0.0
Warlock	1	1.82%	7.29	32.29	1	0.00%	0.2	0	0.00%	0.0
Centaur Warrunner	2	3.64%	5.21	46.88	1	0.00%	0.2	1	0.00%	0.1
Weaver	1	1.82%	4.17	32.29	1	0.00%	0.2	0	0.00%	0.0
Ogre Magi	3	5.45%	3.13	69.79	3	0.00%	0.6	0	0.00%	0.0
Venomancer	4	7.27%	2.08	78.13	2	0.00%	0.4	2	0.00%	0.3
Jakiro	1	1.82%	1.04	32.29	1	0.00%	0.2	0	0.00%	0.0