# Concepts

This section explains the core concepts and methodologies used in Octopus to help you better understand how the tool works and how to use it effectively.

## What You'll Learn

- **Nested Cross-Validation** - Understand the nested CV approach that makes Octopus suitable for small datasets
- **Core Concepts** - Key terms, architecture, and how Octopus works internally
- **Understanding Results** - How to interpret and use the predictions and metrics from Octopus

## Quick Navigation

- [Nested Cross-Validation](nested_cv.md) - Learn about the unique CV strategy that prevents overfitting
- [Understanding Results](understanding_results.md) - How to read and use Octopus outputs

If you're new to Octopus, we recommend starting with "Nested Cross-Validation" to understand why this tool is different.
