The difficult economy is expected to cut into ad budgets into 2009, with advertisers looking to make their budgets stretch further, AdWeek reported Tuesday.

Jack Klues, managing partner of Publicis Groupe's VivaKi, told the Advertising Week “Leadership Conversation” that he believes many advertisers will alter their “media mix” in an effort to make a “relatively fixed amount of dollars work harder.”

Problems on Wall Street are hurting medium-sized and small businesses most, and all advertising categories will suffer into next year, said Wenda Harris Millard, media president and co-CEO of Martha Stewart Living Omnimedia, AdWeek reported.

However, the economic meltdown is a chance for digital to claim more market share, ad digital makes up 28 percent of usage, but has just a 10 percent share of ad spend, said Cheryl Sandberg, COO of Facebook, according to AdWeek.