Many times, people ask about the similarity between SEO and SEM. In nature, they are different but functionality wise they both have the same objective of attracting visitors to the website. SEM is all about getting the traffic on the site through paid ads whereas search engine optimization is focused on analyzing and monitoring organic traffic.
One thing to notice is that both SEO and SEM work and rely on the keywords thing to bring traffic to the site. The marketing techniques which they follow are of different stream. These days, almost everyone is searching online about any product or service before buying them. By using a combination strategy of both the techniques, there are chances to increase the online visibility for the longer term. These both the marketing technique are good for the website that is being marketed for attracting visitors.