How to differentiate SEM & SMO?

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SEM refers to ads and links that are "sponsored" to be placed in designated sections of results pages. If you are participating in paid advertising on a search engine, your ad may show within the special sections of the page reserved for advertisements. Another major distinction, when you "turn off" your SEM campaign, your ads will stop showing where as SEO content is more permanent.

Social media optimization is choosing the best options of what is available to improve your use of social media.SMO is the analysis and strategy creation of what platforms (Facebook, Twitter, etc.) are and/or should be used and how they are being used.