Use timelines if you want to display chronological information. This timeline features timeline icons and user avatars. It is responsive by default.
You can display small dots instead of icons if you prefer a lighter layout. Inspect the source to see the markup details
Timelines can also be used to display message conversations, like inside a support ticket UI for example.
If timelines dont suit your needs, you can use de the simple activity feed to display notifications or whatever chronological content.
Avatars can also easily replaced by icons to emphasize your feed content design.