The script is considering a different spend than the shared budget. Why does this happen?
When a shared budget is created after the month has already begun, Google Ads doesn't transfer the spend that the individual campaign had, over to the spend of the new shared budget. As Optmyzr can only consider the spend from when the shared budget was created, there may be some differences at first.
What is the difference between 'Evenly', 'Evenly with Increases For High Potential Days of the Week', and 'Based on Day of Week Potential'?
'Evenly' takes the remaining budget and divides it evenly between all remaining days.
'Evenly with Increases For High Potential Days of the Week' sets at least the same budget as 'Evenly' but will increase the budget if it thinks today is a day of the week with the potential to get more volume.
'Based on Day of Week Potential' splits the remaining budget based on day of week patterns and can both increase or decrease the budget compared to 'Evenly'.
'Evenly with Increases For High Potential Days of the Week' is the most aggressive method of the three.
Why aren’t budget updates applied to campaigns using campaign total budgets?
The Reach Target Monthly Spend script updates daily budgets and does not support Google Ads’ campaign total budgets. If a campaign uses a total budget for a defined period, the script can’t update those campaigns, and no changes will be applied.