On the left side of the screen, different reports are seen. All different reports (or folders containing reports) are allowed to be viewed.
The small lock icon indicates that this is a private reports to which only a limited number of people have access to these. After selecting one of the reports, it could be possible that you are presented with a parameters page. This page will allow the report to be generated with the parameters you request.
Please select a value for all the required parameters.
If all the parameters are correctly entered a report will be generated and it's directed to a page containing the output. Depending on the type of report, it could be a graph or a table.