Search engines have leveled the marketing field for any business  regardless of strategy, competitor’s space. 

SEO is intended to move a particular website higher in search engine rankings, when an average internet user searches for the website or terms related to that website, the intended site is more likely to be shown to that user.

SEM is a marketing strategy that usually curated paid ads, pay-per-click advertising promotions, and keyword analysis for targeting particular groups of potential customers allowing us to optimize faster.