An internet identity is a social identity that a user establishes in online communities and websites. Most people would use this for online shopping. Another way they would use it would be for social sites like facebook.
Social Media optimization is where you use certain strategies and techniques when promoting something online. This can be done by including keywords and page elements.
I think social media marketing is important because it can increase your chances of getting a lot more people to buy your product.
I chose to use this video because it explains it really well by using cartoon images and smart use of colour and size of letters. It makes it easier to remember the topic.