Answer:
e. search engine optimization
Explanation:
Search Engine Optimisatization (SEO) is the process of improving the visibility of a website with on the web. By providing high quality and relevant content for a website organic/unpaid traffic can be increased as the website will appear at the top of the query results of a web search engine. SEO involves the use of keywords that are likely to be used by clients when they query a search engine such as Google. These keywords help a website to improve its rankings and appear at the top of the search results. This is a critical function in marketing organizations as it directs the target customers to the website.