If you are currently using long descriptions for your Yahoo Ads, be warned that effective this June, the short description option will be the only way to go.
Until end of day today, advertisers have had two options for ad copy; short descriptions utilizing a 70 character limit, and long descriptions providing up to 190 characters. As of June 2007, long descriptions will be eliminated, and those who are unprepared will see their ad copy truncated with an ellipsis.
The limits for short descriptions include 40 characters for the title, 70 for the description, and 35 characters for the display URL.
While ads will continue to run without problem after June 01, campaign performance may be affected by the new truncated ads, so it is recommended to change your ads prior to the switch. More information on the transition can be found at YSM Help.