# Web Mining

**Web Mining** is using data mining techniques to discover useful information from the World Wide Web.

## Types of Web Mining

### 1. Web Content Mining
- **What**: Mining the **actual content** of web pages.
- **Data**: Text, images, audio, video.
- **Example**: Analyzing reviews on Amazon to see if people like a product (Sentiment Analysis).

### 2. Web Structure Mining
- **What**: Mining the **links** (hyperlinks) between pages.
- **Goal**: To find important pages (Authorities) and pages that link to many others (Hubs).
- **Example**: Google's **PageRank** algorithm uses this to rank search results.

### 3. Web Usage Mining
- **What**: Mining **user activity** logs.
- **Data**: Server logs, browser history, clicks.
- **Example**: Analyzing which pages users visit most often and where they leave the site.