You and your product get the credit. Exercise daily and get enough rest. Elvis had it, Tina Turner has it. Shake off your inhibitions and let yourself go. Energy does more to persuade than the fanciest speech.
Clients feel it.
If they don't trust you, they won't buy. Be honest above all. Emphasize the important words in your sentence. The important words are the ones that will benefit the client. When you use this computer network system, you will increase store efficiency.