Allow me to extend a more empathetic answer; stack exchange is great, but the rigid responses are sometimes hard to stomach.
Dopamine is a neurotransmitter that basically works as a messenger between nerve cells. It tells you when you do something good by releasing a chemical that tells the brain “this is nice, this is good”. It’s closely associated with risk taking & reward motivated behavior; pathways or grooves in the brain are created every time a sensation is perceived as good or makes you happy. Everyone’s perception of “happy” or “good” is different based on the life experiences that they have registered in the brain & the grooves they create over time.
Dopamine is tricky… the release of dopamine (in large amounts) tends to leave you with a “high” or feeling of ecstasy… but it can quickly lead to addiction or destructive habits as well. Every time dopamine is released, a groove is created and forms a habit; often times subconsciously you follow that groove every time a similar situation arises because the first time you did, it lead to pleasure. This is where conscious behavior really becomes an important factor, if you’re looking to prevent these habits from taking over your life.
Where certain drugs are prone to release higher amounts of dopamine than others… there are other things in life that create the same dopamine grooves that drugs do, often in equal amounts. Food, sex, gratification from work, Social Media notifications (the research on this today is astounding; now that social media platforms have been around for over a decade, we are starting to see the relationship of depression linked to social media addiction) … all of these things register as pleasing to the brain and therefore grooves are created to remind you how to behave in the future if you want to attain the same “good” feeling.
Pavlov’s dogs are a classic example of ways in which you can train the brain to perform desired reactions using dopamine; but also an example of how it can be used to enslave a being through thought forming behavior. Many arguments could be made on the latter point… from mass distraction of the population to the dumbing down of humanity by those in a position to control… but that’s for another topic
Dopamine is an amazing function of your body… it is wise to understand how it works and how it effects your day to day decision making. I think cell phones are a prime example of how out of control we’ve allowed our behavior to become; I would argue we are all addicted to stimulation and overloading our senses. Over time, the effects will present themselves. My advice is to simplify your life and attempt to limit the sensory interaction each day. Enjoy the little things as much as possible.