When you select nothing it gives you all the opportunities.
If we select the sales department, it will give us all the opportunities of a sales user.
If we select several departments, it gives all the opportunities with one of the users checked.
Creation date : The date when the card was created. Example: I want to see all cards created in July.
Date of last activity: If you are looking for cards with activity between an employee and the customer of a specific date.
Example: I want to see all the cards that had an activity last Saturday.
Date of modification: If you are looking for the cards where the employee has made a modification (quotation, change the stock number, add a customer product, etc). Example: i want to see all cards with a modification from last Thursday.
Sale Date: If you are looking for cards with a sale date. Example: I want to see all cards sold yesterday.
End date: If you are looking for cards with a delivery date (end date). Example: I want to see all cards with an end date for the month.