Pagerank

Brand Positioning refers to the specific value your product or service brings to a client or customer. Companies will attempt to create unique brand positioning to differentiate themselves from their competition.

An example might be positioning your car company as an elite, high-class brand, naturally targeted to more affluent customers, or a reliable, low-budget option, which would bring different customers and marketing considerations with it.

A meta description is an HTML tag for a web page that describes the page briefly, summarizing it. 

Meta descriptions are read by search engines and often displayed for users. For example, the brief description for web pages you see in Google results is often pulled directly from the page’s meta description.

Search Engine Optimization, or SEO, refers to myriad tactics and strategies to increase and maintain both individual web page rankings in search engines as well as the site’s ranking overall for specific keywords.