A strategy is a set of switches to the tools, which are defined in a pre-configured set of options for the synthesis application or the various utilities and programs that run during implementation. Each major release has version-specific strategy options.
VIDEO: See the following for more information: Vivado Design Suite QuickTake Video: Creating and Managing Runs.
Select Settings from the Flow Navigator then select Synthesis, and select a strategy from the Strategy drop-down list, shown in This Figure, and click OK.