The teaser wall is mostly used is a Grid 12. This component is a list of teasers, you can add various options such as story teaser(manual), teaser (manual) in the “Teasers” field. You can enable the “Filter” option which will show category buttons at the top of the wall, and also the “Load More” option which will show a “Load more” button at the bottom of the wall.
The layout and link is a very important component when using teasers.
The teaser external(manual) is used to link external pages into a teaser wall.