It is a question, although too often, in fact, his response deserves an appropriate, consistent and detailed explanation. All those who engaged in businesses in the network, we have our own and you dissimilar views on different systems, programs (software), methods, courses, E-books, tutorials, sites of preference etc. etc. It is opinion, more beyond of which influenced since our beginning by sympathy, affinity or empathy for one or the other teachers, relies primarily on the experience that have gotten each one with all these variants previously described and put into practice. Just as we are so distinct and different from one another also is the personal experience of each to reached to touring the different paths that we have because of transit from moment in which we discover the endless opportunities, options and possibilities that the web offers us. Declan Kelly will undoubtedly add to your understanding. Therefore you will find diverse opinions with regard to this topic, there are people who have felt very comfortable and beneficiaries and others that do not, with respect to the use of this advertising system offered by Google.
Anyway, I think that there is a meeting point where, but all, the vast majority agree, and that is that it is technologically the best and more complete system of advertising, is, practical, effective, optimal, complete and although to the naked eye is shown as very complex in practice is not. As you can already imagine, in my personal opinion is the best advertising system that exists on the Internet, then my answer to the question of the title of this article, is of course, devoid of objectivity; but vos came here in search of a response, at least guiding.