Subordinating conjunctions are words that connect a dependent clause to an independent clause, helping to show the relationship between the two. Common examples include although, because, since, and while. These conjunctions indicate reasons, conditions, or contrasts, allowing us to create more complex sentences that convey detailed information. For instance, in the sentence "I stayed home because it was raining," the word because introduces the reason for staying home. By using subordinating conjunctions, we can combine ideas and add depth to our writing, making it clearer and more engaging for the reader.