What do these items mean?

Incremental data refreshes let you refresh only data that has changed. With less data to refresh it reduces the overall consumption of memory and other resources. For more in depth information about these please refer to the article below.

https://docs.microsoft.com/en-us/power-bi/service-premium-incremental-refresh

Paginated reports, long the standard report format in SQL Server Reporting Services, are now available in the Power BI service. These reports can be printed or shared. They're called "paginated" because they're formatted to fit well on a page. They display all the data in a table, even if the table spans multiple pages. They're sometimes called "pixel perfect" because you can control their report page layout exactly. Paginated reports are based on the RDL report technology in SQL Server Reporting Services. Report Builder is the standalone tool for authoring paginated reports.

For more info you can refer to the link below 

https://docs.microsoft.com/en-us/power-bi/paginated-reports-report-builder-power-bi

Hope this helps!