A proper SEO process improves the quality of your website and increases the traffic you receive by making search engines love your website. When this happens, your links get shown as top search results whenever someone looks for your business online. You get free, consistent, natural visits from prospective customers who are genuinely interested in what your business offers. If you want good results for your website, you need good SEO.
All the major search engines like Google, Bing, Yahoo, etc. show paid listings along with organic search results. It is easy to hack this system by buying ad-spots from Google AdWords or Bing Ads for certain keywords. But people usually look for a large number of widely varied keywords, and bidding on every one of them could be 10-times pricier than doing some basic SEO and organic marketing. A complete integrated marketing strategy is very powerful and can get you multiple times more leads, calls, customers, and clients.