Omega-3 refers to a group of essential fatty acids crucial for maintaining health. These fatty acids are considered "essential" because our bodies cannot produce them and, therefore, we must obtain them through our diet. The three main types of omega-3 fatty acids include:

1. Alpha-linolenic acid (ALA): Primarily found in plant sources like flaxseeds, chia seeds, walnuts, and certain vegetable oils.
   
2. Eicosapentaenoic acid (EPA): Found mainly in fatty fish (such as salmon, mackerel, and sardines) and fish oil supplements.

3. Docosahexaenoic acid (DHA): Also primarily found in fatty fish and fish oil; DHA is a critical component of the brain and retina.

Health Benefits
Omega-3 fatty acids are linked to various health benefits, including:

- Heart Health: They can help reduce triglycerides, lower blood pressure, and decrease the risk of heart disease.
- Brain Function: Critical for cognitive function and may help protect against cognitive decline as we age.
- Anti-Inflammatory Effects: They can help reduce inflammation in the body, which is linked to various chronic diseases.
- Mood Regulation: Some studies suggest a potential role in improving mood and reducing the risk of depression.

Sources
Incorporating omega-3s into your diet can be achieved through:

- Fatty fish like salmon, sardines, and mackerel.
- Vegetable sources like flaxseeds, chia seeds, hemp seeds, and walnuts.
- Omega-3 fortified foods and supplements like fish oil or algal oil.

If you have specific questions or need advice on how to include omega-3s in your diet, feel free to ask!