Further illustrating ETF growth, according to the ETF Industry Association, at the end of May, ETFs accounted for more than $1.14 trillion, an increase of 2% from the month before. There are now 1,465 ETF products trading, up from 1,254 one year ago, reports David Francis for US News.

Financial advisers are the top professionals that need to supply this education and information to their clients. Furthermore, the providers that create and market the ETFs to advisers should make products that are easy to understand, or create ways to explain their products in a language that is clear and simple. [Keeping it Simple with ETFs]

“If we can’t explain to (investors) or the advisors can’t explain to them, it’s not very good,” ThomasFox, co-founder of Quantitative Advantage, said.

Tisha Guerrero contributed to this article.