Communications allow you to leave notes for colleagues or reminders for yourself.
To add a new communication click on the button.
In the new window you can select the communication type from the drop down (selecting the company info option will add to the info tab as well as the communication tab). You can then write the text for the communication.
Finally you can link to a product and a company, you can add a contact and put it on a specific order.
After this click the button to add it to the database.