When creating fiction, writers will inevitable have to learn how to write dialogue. I have never read a novel without it though I suppose one exists somewhere out there. One vital key to good dialogue is attributing the spoken words to the proper character, so readers instantly know who is saying them.
We do this by using dialogue tags: “The last time I heard this song by Charlie Rich,” Liam said, “you were young, adventurous and in love with me.”
The words Liam said is a direct dialogue tag. It tells the reader without fuss or doubt that Liam said those words inside those quotation marks.
Another method of informing readers of who said what is through an action by the character. This is technically not called a dialogue tag, but it does the same job.
For example: “This was my favourite show when I was a kid.” Judy grabbed the clicker and turned up the volume. “My brothers and I watched it every Saturday morning.”
Both these methods of indicating who said what are clean and non-distracting. Readers often won’t notice them, which means they won’t be nudged or jerked from the story, but will continue to read without interruption.