Organic search is a method businesses use when they want to rank high on a search engine’s results page without having to invest in an ad campaign. Usually, this method involves using optimization practices on web pages and blogs and linking strategies, and conducting industry keyword searches that search engines view as valuable. Search algorithms are not entirely known, but marketing experts carefully study results to gather insight into how Google and other search engines rank pages. Some of the organic search engine optimization practices also include using relevant keywords on a page title, regularly posting optimized-blog articles to your site, and engaging with customers on social media platforms. This process takes time. The more you post and optimize your pages, the higher your results, as search engines see your content as relevant and trustworthy.
A good example is Facebook Custom Audiences. Within this Facebook supports email targeting, the ability to upload customer email addresses and then target those users on Facebook with tailored ads. This lets you micro-segment based on your existing customer database. One application is customer loyalty marketing, promoting offers to existing high value users via Facebook ads.
Because so few ordinary users (38% according to Pew Research Center) realized that many of the highest placed "results" on search engine results pages (SERPs) were ads, the search engine optimization industry began to distinguish between ads and natural results. The perspective among general users was that all results were, in fact, "results." So the qualifier "organic" was invented to distinguish non-ad search results from ads.
There is no one size fits all formula when it comes to social media marketing. For instance, a fast food chain restaurant could find a large number of people ordering food on their website with a single organic Facebook post, and on the other hand a medium-sized mobile app development company may see dramatic results with a promoted post on LinkedIn.
Well, yes and no. Sure, you can get hit with an algorithm change or penalty that destroys all your traffic. However, if you have good people who know what they are doing, this is not likely to happen, and if it does, it is easy (in most cases) to get your visits back. Panda and Penguin are another story, but if you get hit by those it is typically not accidental.