Report Template is a specimen for your future reports.

You create a report from scratch, say make it Master-Detail Report with charts, put your company logo, add some default colors(something like same colors your company uses for its documents, webpages etc.) & then save it as BO Report Template file.

Next time when you are creating new reports, & select use Templates option, your report saved as template will be listed in the box. If you select it, your new report will automatically use all color formats, & table-chart structures, logo....whatever you used in your template report file.

Advantage : 1 time devaelopment of display & structure format, for multiple reports use. i.e. Time Saving. No need of formatting for all standard reports.