I'd like to see a recommendation of when to delete keywords that haven't been performing
So far we don’t have it in road map for the next 1 year. We will revisit it mid next year then.
Calvin Wang commented
Currently we can see exactly how well each keyword is performing in terms of clicks and impressions. If a keyword is getting no impressions, then it doesn't hurt to keep it around (perhaps the rare impression will be super relevant and yield a high CTR). If a keyword is getting a lot of impressions but very few clicks, then that's a signal that the keyword itself is not relevant enough. The $1M question is how do you know when the results are statistically significant. It would be nice if Bing Ads could perform statistical analyses and make recommendations based on significant results.