Changing the default value of the Lead Source field from 'Web' to 'Trade Show' is the best way to help the sales reps when they create these lead records, as it will automatically populate the field with the correct value, and save them time and effort.

Explanation
The type of dashboard that GCC should use to display data based on the logged-in user's security setting is a Dynamic dashboard. A Dynamic dashboard allows each user to see the dashboard data according to their own access level and permissions. For example, a sales manager can see the data for their entire team, while a sales rep can only see their own data4. A Static dashboard is a type of dashboard that shows the same data to all users, regardless of their access level and permissions. A Standard dashboard is a type of dashboard that shows the data based on the security setting of the dashboard running user, which is a single user that is specified when the dashboard is created or edited

Converting the Region field to a picklist field is the recommended action to ensure there is correct data for this field. A picklist field allows the user to select a value from a predefined list of values, which ensures data consistency and accuracy. For example, the Region field could have values such as North America, Europe, Asia, and so on. Creating a validation rule to enforce correct spelling would not work, because it would not prevent the field from being blank, and it would not account for different spellings or variations of the same region. Emailing users a list of region names with correct spelling would not work, because it would rely on the users to manually enter the correct values, which is prone to human error and inconsistency.

The switches that the associate should toggle to only show the Record Count are Row Counts and Grand Total. Row Counts is a switch that shows the number of rows in the report, which is the same as the number of records. Grand Total is a switch that shows the sum, average, minimum, maximum, or other aggregate functions of a numeric field in the report. By toggling these two switches on and the other two switches off, the associate can see the Record Count and the Grand Total of the report, without seeing the individual records or the subtotals. Subtotals and Detail Rows are switches that show the breakdown and the details of the records in the report, which are not needed for the Record Count.

Explanation
The type of chart that the associate should add to the report to help visualize the changes in a value over a series of points in time is a line chart. A line chart shows how a numeric value changes over time or across categories, using a continuous line that connects the data points. A line chart is useful for showing trends, patterns, or fluctuations in the data.