People think of emojis and they instantly think of the smiley faces via text messeges or even the poop emoji with the little eyes lol. But they can be used in other places than on your smart phone when talking to friends or family.
Using an emoji shows your emotion, and it's extremely difficult to pick up on the emotions or tone of someone via email or text unless they're using lol, lmao, haha, hehe, etc. at the beginning or end of their posts.
Using an emoji here and there will help show your potential client that you are a nice person and down to earth.
The one thing that I have to express is that you cannot begin to use emojis right off the bat. You need to wait until the potential clients throws in a happy emotion using lol, haha, hehe, etc. or uses their own emoji. The only time it is acceptable to use an emoji with a potential client is if they express they are truly worried about signing up because they've heard bad stories in the past. You can then add in something like "Jane Smith, you have absolutely nothing to worry about. My team and I have been doing this for years and we will treat your Website/Campaign/etc. like it were our own. It will be like you're part of the family " And that's they only time you can do it before them!
The use of emojis will give the potential client the idea that you're not just a cold hearted person at the other end of the email and that you care. This will increase your conversions because they will trust you a bit more and in turn are more willing to sign up