A projection released today by eMarketer shows a growth in online ad spending by 20% this year. This increase is due to the fact companies are spending more on display advertising than had originally been projected. But will it continue to grow? By 2015 eMarketer says that online advertising will make up close to 28% of total US major media ad spending.

If you’ve been holding off from advertising online, it’s probably time to rethink that strategy. Read the full forecast here.