You may create different types of embedded timelines using different sources.
User Timeline. You can choose to create a timeline based on public data of a specific user. The header of the timeline will display a follow button to follow the user, while the footer will allow to send a message to the user without leaving the page.
Favorites. You can create a timeline based on the favorite tweets of a specific user.
List. You can create a timeline based on a list of specific users. The header of the timeline will include the list name, its description, as well as the screen name of the user, who created the list.
Search. You can create a timeline based on a certain hashtag. The timeline will display the search results based on it. The hashtag will be displayed on the header of the timeline, while the footer will allow contributing to the list making a tweet with the hashtag. The list of the search results can be refined to the safe mode, avoiding the display of certain results.