While Facebook still maintains a double-digit growth in advertisement revenue in the US, the rate of that growth slowed down in the second and third quarters of 2018, according to data from a market research firm.

In the third quarter of 2018, Facebook's year-over-year ad-revenue growth rate was 16 per cent, compared to the 30 per cent in the second quarter and 35 per cent in the first quarter of that year, Forbes reported on Monday citing data from Standard Media Index (SMI).