Question

If I add Assets to pmax campaigns or change images etc... Does that reset learning?

Answer 1

Yes, adding or changing assets (like images, videos, headlines, descriptions, etc.) in a PMax campaign does trigger a learning phase reset.

Here's what happens:

• Google treats asset changes as a signal that the campaign’s setup has been altered enough to require re-learning how to serve ads most effectively.

• This includes:

  • Replacing or adding new images/videos

  • Changing ad copy (headlines, descriptions)

  • Swapping product feeds or adjusting creative group structure

However...Minor adjustments may cause less disruption:

• Adding one or two new assets (rather than overhauling everything) may trigger only partial re-learning.

• Google might test the new creatives without fully resetting all historical learning, but performance volatility is still common for a few days.

Pro tip:

If you want to improve creatives without resetting everything:

• Duplicate the asset group and test new assets in a separate one. That way, original groups keep their learning while you test new variations safely.

• Make changes during low-traffic periods (e.g., early in the week or early in the day) to minimize disruption.