Strategies are used by the Vivado Design Suite to control both the tool options and the reports that are generated by synthesis and implementation runs in Project Mode. You can use the strategies to adjust the implementation goals and to control the reports that are generated. For more information on strategies, see the Vivado Design Suite User Guide: Implementation (UG904).
Recommended: Try the default strategy Vivado Implementation Defaults first. It provides a good trade-off between compile time and design maximum operating clock frequency.
Note: Strategies are tool and version specific. In some cases, strategies might require a longer compile time.