A conjunction is a word that connects phrases, clauses, or words in a sentence. Common examples of conjunctions include and, but, and or. They help to create more complex sentences by linking ideas together, making the text flow better and easier to understand. There are two main types of conjunctions: coordinating and subordinating. Coordinating conjunctions, like for and nor, join elements of equal importance, while subordinating conjunctions, such as because and although, connect a dependent clause to an independent clause. Understanding conjunctions is essential for effective communication in writing and speech.