If for nothing at all, making your website visible on search engines like Google, Bing, Yahoo, etc brings in more customers; is good enough reason to get you involved with SEO.
For starters, there are a number of elements that affect how a website is ranked; search engines like Google are frequently changing their ranking methods to warrant that only the most pertinent search results are displayed to searchers.
In recent times, I strongly believe that when you were looking for a service or product, you did a quick search online to find which businesses were available and relevant to your needs; and you only probed further on those that appeared on the first page. Moving on to the second page didn’t seem an option to you. Did it? This act is very normal as searchers are usually pressed for time and only come online to get their “mission accomplished”
Now, making sure that your website appears among the first few in searches made by your target audience is the core of Search Engine Optimization.