There is only one way to describe Sexting

Sexting: is an act that involves sending explicit detailed sexual messages to one another by using mobile text.

You can be as explicit as you want to be, as long as you want it to be, but make sure the person on the other end is as much of a participant as you are.  

Hope you are doing well:-

Erotic and intense

Many lady friends enjoy this type of play between dates! Always discussed before hand, great for keeping the chemistry and connection. Building the anticipation for the next date.
 However some will have no part of it even with terms.

Personally Im an avid reader and sexting REALLY gets me going.  I also happen to have a great imagination which also helps.  Although I know several folks that sexting doesnt really do much for them.  Just depends on who's on the other end.  My problem with sexting is that Im very detailed and my sexting turns into literotica sometimes and is quite long.  Some like it some dont.  But to answer the question sexting is texting someone with sexual references from very mild to extremely explicit.