Half-year pre-tax profits at WPP, the worlds largest advertising group, have risen 36% to �244m.
The figures were boosted by growth in the US and the UK, but the strongest markets are still in Asia, WPP said.
Sir Martin Sorrell, WPPs chief executive, said that mild expansion is replacing the fear phase that was gripping the market last year.
WPP, whose fortunes are an indicator of companies optimism about the future, had revenues of �4.4bn, up 3.5%.
WPP, whose clients include Vodafone and Unilever, said sales in the first half to the end of June were boosted by remarkably strong growth in the US, the largest advertising market.
Major advertisers, such as consumer goods firms Procter & Gamble and Unilever, have increased their marketing budgets in recent weeks.
And broadcasters and media conglomerates such as News Corp and Time Warner have also reported seeing a recovery in advertising sales.
While advertising continues to grow in the digital market, Sir Martin said that traditional media - television and print - are showing signs of strength.