Opteo doesn't use one fixed date range for every Improvement. It looks for the most recent data that's big enough to make a fair decision.

Recent data reflects how an ad account performs now, but a short period may not have enough clicks to judge fairly. So for each keyword, segment or search term, Opteo starts with a short date range and only moves to a longer one if there isn't enough data yet.

"Enough data" depends on how often similar campaigns convert. For example, if a campaign group converts about 1 in 10 clicks, a keyword with 3 conversions from 10 clicks hasn't had enough clicks to judge, so Opteo waits for more data before suggesting a change.

For keyword bids, Opteo also avoids suggesting a change when the bid was changed recently, so it doesn't judge a bid on data from before you changed it.

Each Improvement shows the range it used, for example "using data from the last 30 days".

Most sections in Algorithm Settings have a Minimum Date Range. Opteo won't use less data than this for those Improvements. Choose a longer range if your ad account has seasonal swings or low volume and you want steadier suggestions. See Algorithm Settings Overview.