From 2.14 to 3.50 Matt Cutts from Google says why its a good idea to go into a small niche in the beginning. The video can be found here:
YouTube - Interview with Matt Cutts!
YouTube - Interview with Matt Cutts!
Follow along with the video below to see how to install our site as a web app on your home screen.
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With Matt Cutts you really need to read between the lines on many of his videos. The one where he says Google puts no more authority on links coming from .edu to .gov backlinks is laughable because Google has special programs to teach librarians and government officials how to link out on to quality websites.
I really really wish Google did not have so much power.