Google announced that Adsense publishers will have more control over the look of ads appearing on their sites. Publishers can now change the font face of text in ad units in pages to Arial, Times, or Verdana.
There are two ways for publishers to set custom fonts. One option is to set a custom font as the default for all Adsense content units within the Ad Display Preference section of the account setting page.The other option is to set custom fonts for individual units. When creating a new ad unit, all that is required is selecting the font you want from the fonts drop-down menu. Changing the default font for all Adsense content units will affect all ad units - so choose wisely.
By default, ads are currently set to Standard AdSense Font Family, which Google has found performs well across browsers and displays - although you may want to do some testing to prove it to yourself. With the new choice of the three fonts, many publishers are already asking for Trebuchet also - right out of the gate.
An additional quick note to publishers: Google will be perfoming site maintenance tomorrow, February 21. Publishers will not be able to log into their AdSense or Google Ad Manager accounts between 10am and 2pm PST, but clicks, impressions, and earnings will continue to be tracked.