A WebmasterWorld member asks about the frequency of Quality Index updates on Yahoo Search Marketing.
The answer is that the Quality Index updates daily provided that your ad has served impressions the day before.
How can you maximize your Quality Index? The Yahoo Search Marketing blog gives some insight into this value. Some tips include using relevant keywords, applying the keyword to your creative, taking advantage of excluded keywords, using A/B testing, gathering intelligence, and offering specials.
Forum discussion continues at WebmasterWorld.