When is the best time to implement Bidbrain? High season / low season?

We recommend starting Bidbrain during ''normal'' sales periods. This gives the engine time to learn and prepare for your most important sales periods. If you go live during a high season the risk is that the warm-up period will lose potential volumes for your store and negatively affect the bidding logic as it may place much higher bids on products. The sale peak isn't representing the normal periods.