The use of electronic devices has made this really easy, but 85% of Americans say this is still important when not using phones and computers. What is it?

The use of electronic devices has made this really easy, but 85% of Americans say this is still important when not using phones and computers. What is it?

The use of electronic devices has made this really easy, but 85% of Americans say this is still important when not using phones and computers. What is it?
Ans: Spelling.