With me it's more inhale. But they're related. Snoring is usually caused by either congestion (like with a cold), or by your airway getting restricted (such as with obstructive sleep apnea). Obviously with a cold, it'll pass and is short term. When it's chronic, it's time to see the Doc.
With apnea, the snoring is usually precursor to the breathing stoppage, because in both cases it's caused by the muscles around your airway relaxing and causing your airway to partially or fully collapse. Partial= snoring, full= stop breathing. This is actually normal in almost all people, to a degree. It's measured by what's called the AHI, Apnea-Hypopnea Index. >5 events (10 sec or longer breathing stoppage is an event) per hour is "normal". 5-15 is "mild apnea" and the scores go up from there. Basically every time you have an apnea event (stop breathing), you're depriving your body of oxygen while you have the event. The more often that happens per hour, the worse the effects become to the point where you become hypoxic and can start doing long term damage to your bod. This impacts quality of sleep, can cause high BP, weight gain, mental fog, general fatigue, heart problems, and the list goes on.
If you even think you might be having apena related sleeping issues, it's worth the copay for a doc check. Seriously. Particularly if you have other health problems like being overweight, diabetes, heart issues, mental health concerns, or have high levels of stress. I'm just a random dude on the internet, but I can say that it has and is making a difference in my life and health every night.