How it works
First off, this blog article can give you all the information available around Amazon's Placement reports.
Be sure to understand how high your bids can end up, especially paired with up & down dynamic bidding, to avoid running into unexpected high costs.
Analyzing Performance for different Placements
Generally, it is difficult to give any general advice, as the ad's placement may influence consumer behaviors very differently for different types of products.
Therefore, you should use Sellics' Placements feature to analyze whether a specific placement (i.e. top of search, product detail page, rest of search) works better for certain products/campaigns.
Learning from Data
For instance, if your Conversion Rate is significantly higher for top of search ads than it is for rest of search / product pages for a certain campaign, you may want to make use of placement bid adjustments for the top of search ads.
To determine by how much you should adjust your bid, calculate a new target CPC and thus bid according to the placement's conversion rate, as detailed in the mentioned blog.
Automation Rules work well with dynamic Placement Bidding
Although Sellics is not aware of how many times a bid was decreased or increased in real time through live placement bid changes, it will still make sense for the rules to, for example, decrease the base bid if the ACoS remains too high.