You can add attachments in several places in your monday.com account.
If you'd like to add an attachment to a pulse on the board, please do the following:
1. Click the + sign that appears on the right hand corner of any status
2. Click on Add attachments and you'll see a drop down menu
3. Add the attachment and you can see it at a glance if you scroll over it.
The snapshot of your status will also appear inside the pulse as seen below