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): 3 - Median hero bans (mb): 5 - Matches: 35

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

Balance rank	Winrate	Pickrate	Contest Rate
47.3	47.1	51.2	39.8

Hero	Matches	Contest Rate	Rank	Rev-Rank	Picked	Winrate	mp	Banned	Winrate	mb
Slark	14	40.00%	100.00	21.88	5	100.00%	1.7	9	66.67%	1.8
Snapfire	27	77.14%	98.96	62.50	23	69.57%	7.7	4	50.00%	0.8
Ember Spirit	31	88.57%	97.92	79.17	18	55.56%	6.0	13	61.54%	2.6
Clockwerk	17	48.57%	96.88	58.33	4	100.00%	1.3	13	46.15%	2.6
Dragon Knight	14	40.00%	95.83	46.88	3	100.00%	1.0	11	54.55%	2.2
Techies	4	11.43%	94.79	2.08	3	100.00%	1.0	1	100.00%	0.2
Batrider	34	97.14%	93.75	89.58	5	60.00%	1.7	29	48.28%	5.8
Troll Warlord	13	37.14%	92.71	50.00	3	66.67%	1.0	10	70.00%	2.0
Monkey King	25	71.43%	91.67	78.13	10	70.00%	3.3	15	33.33%	3.0
Legion Commander	5	14.29%	90.63	12.50	3	100.00%	1.0	2	50.00%	0.4
Abaddon	9	25.71%	89.58	28.13	2	50.00%	0.7	7	85.71%	1.4
Broodmother	29	82.86%	88.54	90.63	1	100.00%	0.3	28	42.86%	5.6
Puck	18	51.43%	87.50	75.00	4	75.00%	1.3	14	42.86%	2.8
Silencer	23	65.71%	86.46	85.42	12	41.67%	4.0	11	63.64%	2.2
Skywrath Mage	9	25.71%	85.42	43.75	6	83.33%	2.0	3	0.00%	0.6
Morphling	14	40.00%	84.38	60.42	1	100.00%	0.3	13	53.85%	2.6
Faceless Void	10	28.57%	83.33	41.67	2	50.00%	0.7	8	75.00%	1.6
Shadow Fiend	14	40.00%	82.29	61.46	3	66.67%	1.0	11	54.55%	2.2
Treant Protector	11	31.43%	81.25	57.29	7	71.43%	2.3	4	25.00%	0.8
Disruptor	18	51.43%	80.21	77.08	9	55.56%	3.0	9	44.44%	1.8
Death Prophet	30	85.71%	79.17	94.79	5	40.00%	1.7	25	44.00%	5.0
Bloodseeker	11	31.43%	78.13	55.21	2	50.00%	0.7	9	66.67%	1.8
Primal Beast	26	74.29%	77.08	91.67	16	37.50%	5.3	10	60.00%	2.0
Centaur Warrunner	13	37.14%	76.04	63.54	5	60.00%	1.7	8	50.00%	1.6
Dark Seer	10	28.57%	75.00	47.92	1	100.00%	0.3	9	55.56%	1.8
Naga Siren	6	17.14%	73.96	20.83	2	100.00%	0.7	4	50.00%	0.8
Terrorblade	15	42.86%	72.92	72.92	4	75.00%	1.3	11	36.36%	2.2
Crystal Maiden	4	11.43%	71.88	13.54	2	100.00%	0.7	2	50.00%	0.4
Beastmaster	19	54.29%	70.83	86.46	8	37.50%	2.7	11	54.55%	2.2
Tiny	19	54.29%	69.79	87.50	13	46.15%	4.3	6	33.33%	1.2
Sniper	7	20.00%	68.75	33.33	4	75.00%	1.3	3	33.33%	0.6
Pangolier	16	45.71%	67.71	80.21	8	50.00%	2.7	8	37.50%	1.6
Lifestealer	6	17.14%	66.67	29.17	3	66.67%	1.0	3	66.67%	0.6
Mars	5	14.29%	65.63	14.58	0	0.00%	0.0	5	80.00%	1.0
Nature's Prophet	17	48.57%	64.58	82.29	6	16.67%	2.0	11	72.73%	2.2
Gyrocopter	2	5.71%	63.54	9.38	2	100.00%	0.7	0	0.00%	0.0
Lycan	13	37.14%	62.50	67.71	1	0.00%	0.3	12	58.33%	2.4
Sven	10	28.57%	61.46	66.67	10	50.00%	3.3	0	0.00%	0.0
Rubick	22	62.86%	60.42	97.92	17	35.29%	5.7	5	40.00%	1.0
Brewmaster	4	11.43%	59.38	19.79	3	66.67%	1.0	1	100.00%	0.2
Spectre	2	5.71%	58.33	11.46	1	100.00%	0.3	1	100.00%	0.2
Night Stalker	2	5.71%	58.33	1.04	1	100.00%	0.3	1	100.00%	0.2
Tidehunter	7	20.00%	56.25	51.04	2	50.00%	0.7	5	60.00%	1.0
Doom	6	17.14%	55.21	48.96	3	33.33%	1.0	3	100.00%	0.6
Kunkka	16	45.71%	54.17	88.54	3	33.33%	1.0	13	38.46%	2.6
Enigma	9	25.71%	53.13	64.58	4	50.00%	1.3	5	40.00%	1.0
Undying	13	37.14%	52.08	83.33	3	0.00%	1.0	10	60.00%	2.0
Luna	5	14.29%	51.04	32.29	2	50.00%	0.7	3	66.67%	0.6
Hoodwink	4	11.43%	50.00	31.25	3	66.67%	1.0	1	0.00%	0.2
Queen of Pain	6	17.14%	48.96	54.17	2	50.00%	0.7	4	50.00%	0.8
Enchantress	5	14.29%	47.92	52.08	3	33.33%	1.0	2	100.00%	0.4
Zeus	5	14.29%	46.88	53.13	3	66.67%	1.0	2	0.00%	0.4
Dawnbreaker	4	11.43%	45.83	27.08	1	100.00%	0.3	3	33.33%	0.6
Mirana	9	25.71%	44.79	81.25	8	37.50%	2.7	1	0.00%	0.2
Storm Spirit	10	28.57%	43.75	84.38	5	20.00%	1.7	5	60.00%	1.0
Pudge	5	14.29%	42.71	42.71	1	0.00%	0.3	4	75.00%	0.8
Slardar	1	2.86%	41.67	10.42	1	100.00%	0.3	0	0.00%	0.0
Omniknight	1	2.86%	41.67	8.33	1	100.00%	0.3	0	0.00%	0.0
Elder Titan	1	2.86%	41.67	8.33	1	100.00%	0.3	0	0.00%	0.0
Bounty Hunter	1	2.86%	41.67	8.33	1	100.00%	0.3	0	0.00%	0.0
Underlord	1	2.86%	41.67	8.33	1	100.00%	0.3	0	0.00%	0.0
Weaver	1	2.86%	41.67	8.33	1	100.00%	0.3	0	0.00%	0.0
Ursa	14	40.00%	35.42	95.83	5	0.00%	1.7	9	55.56%	1.8
Outworld Destroyer	3	8.57%	34.38	17.71	0	0.00%	0.0	3	66.67%	0.6
Alchemist	5	14.29%	33.33	56.25	2	50.00%	0.7	3	33.33%	0.6
Tusk	16	45.71%	32.29	100.00	8	12.50%	2.7	8	37.50%	1.6
Timbersaw	13	37.14%	31.25	98.96	4	0.00%	1.3	9	44.44%	1.8
Spirit Breaker	2	5.71%	30.21	16.67	1	100.00%	0.3	1	0.00%	0.2
Magnus	2	5.71%	30.21	16.67	1	100.00%	0.3	1	0.00%	0.2
Visage	6	17.14%	28.13	71.88	3	33.33%	1.0	3	33.33%	0.6
Earth Spirit	2	5.71%	27.08	26.04	2	50.00%	0.7	0	0.00%	0.0
Wraith King	1	2.86%	26.04	3.13	0	0.00%	0.0	1	100.00%	0.2
Drow Ranger	9	25.71%	25.00	92.71	5	20.00%	1.7	4	25.00%	0.8
Leshrac	10	28.57%	23.96	96.88	5	20.00%	1.7	5	20.00%	1.0
Marci	3	8.57%	22.92	45.83	2	50.00%	0.7	1	0.00%	0.2
Keeper of the Light	3	8.57%	22.92	45.83	2	50.00%	0.7	1	0.00%	0.2
Invoker	5	14.29%	20.83	76.04	3	0.00%	1.0	2	100.00%	0.4
Phantom Assassin	4	11.43%	19.79	73.96	4	25.00%	1.3	0	0.00%	0.0
Viper	2	5.71%	18.75	18.75	0	0.00%	0.0	2	50.00%	0.4
Phantom Lancer	2	5.71%	17.71	30.21	1	0.00%	0.3	1	100.00%	0.2
Chaos Knight	4	11.43%	16.67	59.38	0	0.00%	0.0	4	25.00%	0.8
Templar Assassin	7	20.00%	15.63	93.75	2	0.00%	0.7	5	20.00%	1.0
Lina	1	2.86%	14.58	39.58	1	0.00%	0.3	0	0.00%	0.0
Dazzle	1	2.86%	14.58	39.58	1	0.00%	0.3	0	0.00%	0.0
Lich	1	2.86%	14.58	39.58	1	0.00%	0.3	0	0.00%	0.0
Razor	1	2.86%	14.58	39.58	1	0.00%	0.3	0	0.00%	0.0
Clinkz	1	2.86%	10.42	25.00	0	0.00%	0.0	1	0.00%	0.2
Huskar	1	2.86%	10.42	25.00	0	0.00%	0.0	1	0.00%	0.2
Lone Druid	1	2.86%	8.33	39.58	1	0.00%	0.3	0	0.00%	0.0
Shadow Demon	1	2.86%	8.33	39.58	1	0.00%	0.3	0	0.00%	0.0
Venomancer	1	2.86%	6.25	25.00	0	0.00%	0.0	1	0.00%	0.2
Jakiro	2	5.71%	5.21	70.83	2	0.00%	0.7	0	0.00%	0.0
Earthshaker	2	5.71%	5.21	70.83	2	0.00%	0.7	0	0.00%	0.0
Riki	2	5.71%	5.21	70.83	2	0.00%	0.7	0	0.00%	0.0
Anti-Mage	3	8.57%	2.08	65.63	0	0.00%	0.0	3	0.00%	0.6
Warlock	1	2.86%	1.04	41.67	1	0.00%	0.3	0	0.00%	0.0