CAST Communication Competency Practice Exam 2025 – Comprehensive Test Prep Resource

The algorithm that Google uses to calculate webpage relevance to search keywords is PageRank. This algorithm analyzes the link structure of the web to determine the importance of individual pages. By evaluating the quantity and quality of links pointing to a webpage, PageRank helps to measure how reputable and relevant a page is in relation to specific search queries.

PageRank works on the principle that more important websites are likely to receive more links from other websites. Thus, a page that is linked to by many high-quality pages is considered more valuable and is ranked higher in search results. This foundational aspect of Google's search algorithm has played a crucial role in providing users with the most relevant content for their inquiries, thereby optimizing the search experience.

The other options do not reflect the correct terminology or recognized algorithms used by Google. For example, BingRank and Keyword Rank are not established terms in the context of algorithms used in search engine optimization like PageRank, while SearchRank does not refer to any specific ranking algorithm utilized by Google. This context emphasizes the unique significance of PageRank within Google's search technology.