We suggest updating the Strategy Boost daily based on the anticipated uplift of Conversion Rate or Revenue-Per-Click for sales periods. This is true if sales extend beyond a day, or you expect conversion rates to increase substantially.
We recommend two ways to control spend rate during a sale using Strategies: You can modify the Strategy Target or you can use Boost; we recommend Boost. To learn more about Boost and other Bidding rules, check out our dedicated article.