When you are speaking in any capacity no one wants to be tuned out or feel like they are being tuned out. Sometimes though people's minds will wander when you're talking if you speak with these bad habits:
1. You run on too long
Time is money and if you can't get to the point of your story asap then people will lose interest quickly.
How to fix it: Never spend more time talking than you are listening
2. All you do is talk about yourself
When you talk about yourself the entire time you are telling the other person that you don't care what they have to say or what's going on with them yet you want them to care about what's going on with you. Turns out you're turning them off and they in turn, tune you out too.
How to fix: Listen and actually care about what they have to say
3. You've lost credibility
In your personal life and business your reputation is everything and once people deem what you say not creditable you are going to have a tough time retaining interest. You're just noise at that point.
How to fix: Keep your word when you say you are going to do something and don't embellish stories
4. You go over well-treaded ground
If everything you are saying sounds like everything that everyone else has already said then there is no reason to even listen to you.
How to fix: Consider what you are adding to the conversation.