This useful online marketing blog was launched as the sister site to SEO Book which provides search engine optimisation advice and tips. PPC Blog acts in a similar way but provides useful information, tips and advice for paid search marketing so that you can get the most from your search engine marketing campaign. PPC Blog has a section which lists the best and most affordable competitive analysis tools and also has the option for you to sign up for coupons so you can receive money off your next Google Adwords or Yahoo! campaigns.