Oregano oil is an essential oil extracted from the leaves and flowers of the oregano plant, scientifically known as Origanum vulgare or Origanum heracleoticum. Here's a concise overview:

1. **Aroma**: Oregano oil has a strong, spicy, and herbaceous aroma with a sharp and slightly medicinal scent. Its fragrance is potent and often used in aromatherapy for its antimicrobial properties.

2. **Antimicrobial Properties**: Oregano oil is prized for its powerful antimicrobial properties. It contains compounds like carvacrol and thymol, which have strong antibacterial, antifungal, and antiviral effects. It's commonly used to combat infections, boost immunity, and support overall health.

3. **Respiratory Support**: Due to its expectorant properties, oregano oil is often used to support respiratory health. It can help relieve symptoms of coughs, colds, and sinusitis by loosening mucus and easing breathing when diffused into the air or used in steam inhalation.

4. **Digestive Aid**: Oregano oil is believed to support digestive health. It can help stimulate the appetite, aid in digestion, and relieve symptoms of bloating, gas, and indigestion when diluted and applied topically to the abdomen or diffused into the air.

5. **Immune Support**: Oregano oil is commonly used to boost immunity and fend off infections. It can help strengthen the immune system, fight off harmful pathogens, and reduce the severity and duration of illnesses when used preventatively or at the onset of symptoms