Table: Search Ad Revenue Share, 2017-2021

Google’s position as the search advertising leader in the US is on solid footing, according to eMarketer’s latest US digital ad spending estimates. This year, Google will net more than 73% of US search ad spending, down less than 1 percentage point since 2018.

By the end of their forecast period in 2021, Google will have lost more than 2 percentage points more in share. The winner there will be Amazon, which has been the second-largest search ad seller in the US since 2018, when it surpassed Microsoft.

Overall, search ad spending is growing robustly, driven by spending on the market leaders. This year, search outlays will rise by almost 18%, and doubled-digit increases will continue through 2021. Read the rest at eMarketer.