Yesterday, many advertisers have been complaining in the Google AdWords Help forums that many of their keywords and campaigns now have the warnings, “Low Share of Voice.” Here is a screen capture of the warning:

We have many threads on the topic and many complaints from Google AdWords advertisers. A Google AdWords representative chimed in, but he/she really did not have much to say, outside of we hear you, we are listening and good luck. Here is what the AdWords rep said:

I am not sure if they released a new update that impacted many accounts or if this is a bug. I guess time will tell.

Forum discussion at Google AdWords Help.