How to split an ad group into several ad groups
If an ad group contains more than 200 keywords, such an ad group is marked by . You need to split the group before you send your campaign to the server. Splitting creates an identical group (or several groups). All the non-archived ads are copied to it and “extra” keywords are moved to it.
To split an ad group, click Split group in the error prompt.
To split several ad groups, select the groups, right-click on any of them, and select Split group in the menu.