A shallow depth of field can be one answer to help separate the key point of your photo. It will separate the subject from the background. Here is a photo taken at a pet event to illustrate.
Lifestyle photography often makes us decide how best to showcase subjects and what they are doing. We want to be sure that some of the details we allow into the scene, pinpoint the real time activities. Here is an example of two happy dogs enjoying an evening by the water with their owner. I don't believe the owner even knew I snapped this photo.
I am not going to show you a macro photography example this week. I will, however, show you the facial expression of one small dog, named Luke, hoping someone will play with him and his favorite ball. I got in a little closer to Luke in this image and used that shallow depth of field to focus only on his expression and the coveted yellow Kong ball.
P.S. Have a great weekend free of rain, and say a little prayer for all those either trying to have a normal life again after a devastating hurricane, or those about to be hit by one. My heart goes out to everyone affected.