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): 5 - Matches: 54

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

Balance rank	Winrate	Pickrate	Contest Rate
56.6	71.2	44.2	37.5

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Terrorblade	47	87.04%	100.00	71.88	19	68.42%	3.8	28	57.14%	5.6
Invoker	44	81.48%	98.96	69.79	11	100.00%	2.2	33	39.39%	6.6
Batrider	20	37.04%	97.92	29.17	5	80.00%	1.0	15	73.33%	3.0
Luna	39	72.22%	96.88	65.63	19	73.68%	3.8	20	45.00%	4.0
Axe	39	72.22%	95.83	67.71	14	57.14%	2.8	25	68.00%	5.0
Nyx Assassin	35	64.81%	94.79	68.75	19	63.16%	3.8	16	56.25%	3.2
Drow Ranger	28	51.85%	93.75	59.38	10	60.00%	2.0	18	66.67%	3.6
Phoenix	26	48.15%	92.71	56.25	15	66.67%	3.0	11	54.55%	2.2
Clockwerk	17	31.48%	91.67	37.50	9	77.78%	1.8	8	50.00%	1.6
Broodmother	41	75.93%	90.63	84.38	6	66.67%	1.2	35	48.57%	7.0
Lone Druid	9	16.67%	89.58	8.33	2	100.00%	0.4	7	71.43%	1.4
Mirana	20	37.04%	88.54	55.21	16	62.50%	3.2	4	50.00%	0.8
Faceless Void	28	51.85%	87.50	72.92	6	66.67%	1.2	22	50.00%	4.4
Io	18	33.33%	86.46	47.92	6	66.67%	1.2	12	58.33%	2.4
Winter Wyvern	32	59.26%	85.42	78.13	12	41.67%	2.4	20	65.00%	4.0
Lion	17	31.48%	84.38	53.13	13	61.54%	2.6	4	50.00%	0.8
Timbersaw	41	75.93%	83.33	89.58	14	42.86%	2.8	27	51.85%	5.4
Razor	17	31.48%	82.29	54.17	10	60.00%	2.0	7	57.14%	1.4
Templar Assassin	36	66.67%	81.25	86.46	10	50.00%	2.0	26	46.15%	5.2
Hoodwink	35	64.81%	80.21	87.50	24	50.00%	4.8	11	36.36%	2.2
Abaddon	25	46.30%	79.17	79.17	16	50.00%	3.2	9	44.44%	1.8
Medusa	28	51.85%	78.13	82.29	3	66.67%	0.6	25	44.00%	5.0
Lina	46	85.19%	77.08	97.92	24	33.33%	4.8	22	54.55%	4.4
Mars	27	50.00%	76.04	83.33	11	45.45%	2.2	16	50.00%	3.2
Pangolier	24	44.44%	75.00	80.21	10	40.00%	2.0	14	57.14%	2.8
Leshrac	17	31.48%	73.96	64.58	8	50.00%	1.6	9	55.56%	1.8
Centaur Warrunner	4	7.41%	72.92	6.25	3	100.00%	0.6	1	0.00%	0.2
Viper	32	59.26%	71.88	91.67	8	50.00%	1.6	24	37.50%	4.8
Dark Willow	8	14.81%	70.83	23.96	4	50.00%	0.8	4	100.00%	0.8
Phantom Lancer	19	35.19%	69.79	70.83	3	33.33%	0.6	16	56.25%	3.2
Ancient Apparition	21	38.89%	68.75	77.08	7	42.86%	1.4	14	50.00%	2.8
Tiny	6	11.11%	67.71	10.42	2	100.00%	0.4	4	50.00%	0.8
Ember Spirit	14	25.93%	66.67	57.29	5	60.00%	1.0	9	44.44%	1.8
Slardar	9	16.67%	65.63	30.21	4	75.00%	0.8	5	40.00%	1.0
Spectre	17	31.48%	64.58	66.67	3	66.67%	0.6	14	42.86%	2.8
Keeper of the Light	10	18.52%	63.54	41.67	8	50.00%	1.6	2	100.00%	0.4
Windranger	4	7.41%	62.50	7.29	2	100.00%	0.4	2	50.00%	0.4
Tusk	6	11.11%	61.46	25.00	5	60.00%	1.0	1	100.00%	0.2
Grimstroke	8	14.81%	60.42	32.29	4	50.00%	0.8	4	75.00%	0.8
Jakiro	2	3.70%	59.38	4.17	2	100.00%	0.4	0	0.00%	0.0
Beastmaster	5	9.26%	58.33	12.50	2	100.00%	0.4	3	33.33%	0.6
Puck	36	66.67%	57.29	100.00	8	37.50%	1.6	28	28.57%	5.6
Storm Spirit	11	20.37%	56.25	51.04	3	33.33%	0.6	8	62.50%	1.6
Elder Titan	4	7.41%	55.21	9.38	3	66.67%	0.6	1	100.00%	0.2
Tidehunter	24	44.44%	54.17	95.83	10	40.00%	2.0	14	28.57%	2.8
Enchantress	18	33.33%	53.13	85.42	8	25.00%	1.6	10	60.00%	2.0
Anti-Mage	6	11.11%	52.08	21.88	2	50.00%	0.4	4	75.00%	0.8
Snapfire	13	24.07%	51.04	76.04	11	45.45%	2.2	2	0.00%	0.4
Phantom Assassin	5	9.26%	50.00	18.75	3	66.67%	0.6	2	50.00%	0.4
Zeus	10	18.52%	48.96	61.46	4	50.00%	0.8	6	33.33%	1.2
Morphling	14	25.93%	47.92	81.25	5	20.00%	1.0	9	55.56%	1.8
Naga Siren	7	12.96%	46.88	39.58	3	33.33%	0.6	4	75.00%	0.8
Gyrocopter	9	16.67%	45.83	60.42	5	40.00%	1.0	4	50.00%	0.8
Chen	3	5.56%	44.79	11.46	3	66.67%	0.6	0	0.00%	0.0
Ursa	7	12.96%	43.75	36.46	1	0.00%	0.2	6	66.67%	1.2
Wraith King	7	12.96%	42.71	48.96	4	25.00%	0.8	3	100.00%	0.6
Vengeful Spirit	4	7.41%	41.67	22.92	3	66.67%	0.6	1	0.00%	0.2
Juggernaut	6	11.11%	40.63	33.33	2	0.00%	0.4	4	100.00%	0.8
Doom	6	11.11%	39.58	34.38	2	100.00%	0.4	4	0.00%	0.8
Pugna	8	14.81%	38.54	46.88	1	0.00%	0.2	7	57.14%	1.4
Lifestealer	8	14.81%	38.54	46.88	1	0.00%	0.2	7	57.14%	1.4
Dark Seer	16	29.63%	36.46	90.63	4	25.00%	0.8	12	33.33%	2.4
Alchemist	8	14.81%	35.42	62.50	5	40.00%	1.0	3	33.33%	0.6
Sand King	9	16.67%	34.38	73.96	5	40.00%	1.0	4	25.00%	0.8
Dragon Knight	20	37.04%	33.33	98.96	9	11.11%	1.8	11	45.45%	2.2
Night Stalker	1	1.85%	32.29	3.13	1	100.00%	0.2	0	0.00%	0.0
Chaos Knight	6	11.11%	31.25	50.00	4	25.00%	0.8	2	100.00%	0.4
Void Spirit	15	27.78%	30.21	96.88	9	22.22%	1.8	6	33.33%	1.2
Shadow Demon	12	22.22%	29.17	88.54	6	16.67%	1.2	6	50.00%	1.2
Brewmaster	4	7.41%	28.13	35.42	3	33.33%	0.6	1	100.00%	0.2
Magnus	12	22.22%	27.08	94.79	9	22.22%	1.8	3	33.33%	0.6
Monkey King	12	22.22%	26.04	93.75	5	20.00%	1.0	7	28.57%	1.4
Necrophos	1	1.85%	25.00	2.08	0	0.00%	0.0	1	100.00%	0.2
Kunkka	1	1.85%	25.00	5.21	0	0.00%	0.0	1	100.00%	0.2
Tinker	1	1.85%	25.00	2.08	0	0.00%	0.0	1	100.00%	0.2
Oracle	10	18.52%	21.88	92.71	5	20.00%	1.0	5	20.00%	1.0
Treant Protector	4	7.41%	20.83	40.63	2	0.00%	0.4	2	100.00%	0.4
Disruptor	3	5.56%	19.79	38.54	3	33.33%	0.6	0	0.00%	0.0
Slark	2	3.70%	18.75	20.83	1	0.00%	0.2	1	100.00%	0.2
Bristleback	2	3.70%	18.75	20.83	1	0.00%	0.2	1	100.00%	0.2
Death Prophet	4	7.41%	16.67	52.08	1	0.00%	0.2	3	33.33%	0.6
Arc Warden	5	9.26%	15.63	75.00	2	0.00%	0.4	3	33.33%	0.6
Troll Warlord	1	1.85%	14.58	17.71	0	0.00%	0.0	1	0.00%	0.2
Undying	1	1.85%	14.58	17.71	0	0.00%	0.0	1	0.00%	0.2
Legion Commander	1	1.85%	14.58	17.71	0	0.00%	0.0	1	0.00%	0.2
Sven	1	1.85%	14.58	17.71	0	0.00%	0.0	1	0.00%	0.2
Venomancer	2	3.70%	10.42	44.79	1	0.00%	0.2	1	0.00%	0.2
Bloodseeker	1	1.85%	9.38	17.71	0	0.00%	0.0	1	0.00%	0.2
Techies	1	1.85%	8.33	28.13	1	0.00%	0.2	0	0.00%	0.0
Warlock	1	1.85%	8.33	28.13	1	0.00%	0.2	0	0.00%	0.0
Rubick	2	3.70%	6.25	44.79	1	0.00%	0.2	1	0.00%	0.2
Earth Spirit	2	3.70%	5.21	58.33	2	0.00%	0.4	0	0.00%	0.0
Underlord	2	3.70%	4.17	31.25	0	0.00%	0.0	2	0.00%	0.4
Nature's Prophet	2	3.70%	3.13	44.79	1	0.00%	0.2	1	0.00%	0.2
Enigma	3	5.56%	2.08	63.54	1	0.00%	0.2	2	0.00%	0.4
Lycan	1	1.85%	1.04	28.13	1	0.00%	0.2	0	0.00%	0.0