Another bid settings update across Sponsored Product campaigns - The ability to select whether SP ads served off-Amazon ads are optimized for maximum reach or maximum spend. In SP campaign settings, we now have:
🔶 Rule-based bidding
🔶 Dynamic Bids up & down, down only, Fixed bids
🔶 Bid placement modifiers (ToS, Rest of Search, Product Pages)
🔶 Amazon Business placement modifiers
🔶 Settings for Ads served off-Amazon

Don't forget about SP Cross-Retailer availability as well!

With the number of new bid settings & capabilities rolled out over the past few months, it's definitely important to continue testing, but also ensure existing campaigns' bid settings are set properly, based on the strategy & intent of each respective campaign. The more "layers" you engrain into your campaigns, the more complicated it can become to optimize.