If you look at our data that shows how long each search that users are making is you will see that 94% of searches made by users are 4 or less words long. Shor

If you look at our data that shows how long each search that users are making is you will see that 94% of searches made by users are 4 or less words long. Short tail keywords will still catch long tail phrases with BMM for example the two word keywords +ppc +agency will still catch a search like "ppc management agency prices in york" which is along tail search query. If you add 1000000000 million long tail keywords to capture that 6% of long tail searches that will never = the 94% of searchers that are shorter than 4 words in length. So 100K 5-word phrases = 6K impressions and 10K 2-word phrases = 94K impressions