Everything You Need to Know about PPC: Interview with Spectrum Search Marketing Founder, Bryan Larkin
GreenRope
OCTOBER 20, 2014
They are just as important as explicit keywords you want to advertise for and can help improve click through rates (CTR) and keep costs to a minimum. In some cases this will be good, especially for lowering the barriers of entry for newer advertisers. Do your research. A few of these include spyfu.com , semrush.com, ispionage.com.
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