Lost IS (budget), aka “budget too low” – Do your campaigns have set daily/monthly budget caps? If so, are your campaigns hitting their caps frequently? Budget caps help pace PPC spend but can also suppress yours Ads from being shown if set too low. Google calls it “throttling” where Adwords won’t serve up ads every time they are eligible to be shown in an effort to allow your account to evenly pace through the daily budget.
Campaign- and issue-based efforts: If you have a short-term campaign for a new product, service, or special issue, pay per click can be a great way to quickly generate buzz. You can start a pay per click campaign within, at most, 24-48 hours, and you can generally change the text of your ad mid-campaign, so adjusting your message is easy. If you need to focus attention for a finite amount of time, PPC is perfect.
Search engine optimization (SEO) is the process of affecting the online visibility of a website or a web page in a web search engine's unpaid results—often referred to as "natural", "organic", or "earned" results. In general, the earlier (or higher ranked on the search results page), and more frequently a website appears in the search results list, the more visitors it will receive from the search engine's users; these visitors can then be converted into customers. SEO may target different kinds of search, including image search, video search, academic search, news search, and industry-specific vertical search engines. SEO differs from local search engine optimization in that the latter is focused on optimizing a business' online presence so that its web pages will be displayed by search engines when a user enters a local search for its products or services. The former instead is more focused on national or international searches.