Symbols in the first column on the List windows indicate the status of a line item:
An exclamation mark is an alert that something about the record is incomplete or in error, i.e., it cannot be pushed to the database.
Two arrows in a sync motion shows the line item is ready to be pushed to the database. If you are connected via WiFi or Cellular, the line is uploaded to the main server as soon as you save a record.
A cloud indicates that the record has not been downloaded to the iPad. This lets you know the information is in the cloud and will be downloaded shortly.
A check mark indicates the line has been uploaded to the main server. Records downloaded from the server also show this symbol.