Changing your LSA budget while Google’s bidding system is learning can affect how the campaign performs because the system may need time to adjust to the new budget and available demand. A large or frequent budget change can make performance less predictable while Google recalibrates its bidding.
If you need to change the budget, avoid making major adjustments repeatedly. Give the campaign enough time to collect data after the change, then compare lead volume, cost per lead, lead quality, and booked customers. If you increase the budget, make sure your business can handle the additional leads and that the current leads are already worth the cost.
In short, you can change your budget during the learning period, but smaller, deliberate changes are generally easier to evaluate than constant or dramatic changes.
