Which Campaigns Are Best for Fixed Bids or Dynamic Bids?

When Fixed Bids Tend to Work Best

Fixed Bids can be a good fit for campaigns that already have consistent conversion rates and a stable cost per click. If a product keyword has performed well for several weeks without major swings, keeping a fixed bid may help you maintain predictable margins. This is especially common for branded search terms or high-intent exact match keywords where conversion behavior is steady.

Fixed Bids do not mean the campaign is frozen. You can still update bids based on new data, but the default behavior remains consistent until you choose to make a change.

When Dynamic Bids Are the Safer Starting Point

Campaigns in crowded categories, highly seasonal niches, or launch periods often perform better with Dynamic Bids. In these cases, demand and competition change quickly, so a flexible bid can help capture opportunities when Amazon sees a higher chance of conversion. Dynamic Bids are useful when you do not yet have enough stable performance data to lock in a reliable bid.

• New campaigns with limited conversion history
• Seasonal or trend-driven products
• Categories where top-of-search placement changes frequently

Using Performance Data to Decide

Instead of guessing, review per-campaign performance before choosing a strategy. Look for stable spend, sales, and ROAS over time. If metrics drift heavily or search terms change often, Dynamic Bids may be the more flexible option. The Amazon Ads Dashboard by Todoza can help you spot these patterns by consolidating campaign metrics and wasted spend across accounts.

You can also use a negative keyword tool to clean up search terms before changing bid strategy, so your flexible or fixed bid is not applied against irrelevant traffic.