When someone says something funny, we say LOL which stands for Laugh out Loud. However, we are not really laughing, we smile a little then we stop, right? So SALTS = smile a little, then stop
SALTS is used when something isn’t funny enough to “laugh out loud” but it was funny enough to smile a little. SALTS = Smiled A Little Then Stopped. SALTS is almost always used in texting.