Estimating traffic generated by Internet marketing campaigns is difficult due to the dynamic nature of search engines, web sites, end-user behavior, etc. However, in this post we provide the foundations so we can develop relatively simple formulations that can approximate this behavior for highly targeted marketing campaigns.
In the following, we discuss how the amount of traffic generated to a website by Internet marketing due to SEO and PPC can be estimated. We develop two models that can estimate traffic due to SEO: 1) a model based on surfing behaviors; and, 2) a traffic model based upon the server’s weblogs. Other types of traffic – Email, SMO, etc., are addressed as well.
A. SEO Traffic Modeling Assumptions
One of the objectives of SEO is to increase volume and quality of (organic) traffic to a web site from the search engines. In general, the earlier a site is presented in the search engine results pages (SERP), the higher it ranks. In fact, one of the goals of SEO is to get organic rankings for the site in the top 10 or so listings of the SERP for identified key business phrases. The reason is that studies have shown that the higher the site is ranked in the SERP, then the likelihood of the user clicking the link associated with that site is higher [3]. Also, studies have shown that when a link is listed after the first 2 pages, it is rarely clicked [3].
Recalling what SEO involves, the following steps (very) briefly describe this activity:
- Key Phrase Analysis – involves determining what phrases surfers utilize to visit the web site and convert. Usually, a set of phrases are formulated that best describes the business and the products/services.
- On-Page SEO – includes amending HTML code on existing web pages (i.e., modifying the title, meta tags, and content of pages to include key phrases); and, if necessary, creating additional pages with content relevant to the search phrases identified in Step 1. These actions increase the likelihood that users will visit the site using identified phrases.
- Off-Page SEO – includes link building, which consists of submitting the website to major search engines and directories, and trying to obtain back links from “relevant” sites.
To develop a traffic model for SEO, it is important that the following assumptions are made:
Assumption 1. Reasonable estimates of key phrase rankings due to SEO efforts are possible.
Assumption 2. Key phrases identified in Step 2 are representative of organic search terms surfers utilize when visiting the site.
From our experience, Assumption 1 is actually relatively easy to do for an experienced SEO. The reason is that search engine ranking algorithms (i.e., PageRank, Yahoo!, MSN, etc.) tend to have ranking peculiarities and knowledgeable SEO’s understand and know how to take advantage of this.
Assumption 2 turns out to be much more difficult since user searching behavior tends to be very unpredictable. In fact, it is known that on any given day 20 – 25% of the searches in the Google query logs are new. This presents a problem, which we address in a later section where we develop Search Grammars that characterize phrases surfers are likely to search on.
In the next post, we’ll discuss an organic click-through model.
Posted by pmfiorini on Jan 6 2010 in SEO Research