The news: The US ad market grew at a weak 2.8% in March after double-digit gains in February, according to Guideline data cited by Mediapost.

Digital advertising drove the strongest growth, increasing 8.8% YoY in March; traditional ad spending, in contrast, shrunk 11.1% YoY. Digital accounted for 74% of total US ad spending in the tracked period.

Behind the numbers: Total ad spending is shrinking in part from geopolitical and macroeconomic pressures.