What is the relationship between SEO and SEM?

[shoppingswag]

What is the relationship between SEO and SEM?

[milinmaru]

The simplest answer, SEO is free and responsible for organic traffic/ranking. Whereas SEM refers to the paid campaign. Appears in the top google paid ad column.

The goals of both are the same to draw more traffic to the website. But completely follows different strategies to reach the optimum level.

The relationships are linked to website growth. The two variable doesn't depend upon each other and operates in a parallel direction. Only content has linkage with both as its most important element in both cases.

[yuva12]

SEO :
Seo is the process of optimizing the website to reach a better position in search engine. Seo focuses on rankings in organic search results. By Seo, business or a website can gain more popularity and visibility hence it improves the profits.
SEM:
Search Engine Marketing is basically advertising your products or services on search engines.

[tomdeep]

SEO is the way which generating traffic through the organic way
SEM is the way which generating traffic through the paid way

[nancy07]

SEM and SEO are very different from each other bus somehow intersect to each other.
While creating ads in Google AdWords, we receive an ad score from Google, which determines the ad and website quality. This website quality refers to how well the website is optimized.