Most of the creative work in Premiere Pro happens when you build a sequence of clips that play, one after another. You’ll need to create a sequence before you can add clips to it.
What you learned: Build a sequence
When you create a sequence, it appears in the Project panel along with your clips. You can create as many sequences as you want in the same project.
To create a new sequence, drag one or more clips into the empty Timeline panel, or select one or more clips in the Project panel, right-click on the selection and choose New Sequence from Clip.
Add more clips by dragging them into the Timeline panel.
To remove a clip from the sequence, select it and press Backspace (Windows) or Delete (macOS). If you select clips and press Shift+Delete (Windows) or Shift+fn+Delete (macOS), they will be removed without leaving a gap in the sequence.