<span class="cf0">Btw is often used because it's quick and easy, and allows you to change the subject smoothly without seeming abrupt. This is useful for adding reminders, comments, or additional thoughts that aren't the main topic of the conversation. As online discussions evolve rapidly, using abbreviations like "by the way" can save time and keep your messages casual and friendly. Because it is widely understood, users can communicate effectively without the need for lengthy explanations each time. </span>