Website development involves designing, creating, and maintaining websites. It includes aspects such as coding, programming, and content management to ensure the website functions correctly and provides a seamless user experience.

Security measures include:

1. Planning
2. Design
3. Development
4. Testing
5. Launch
6. Maintenance

SEO techniques include:

1. Using relevant keywords in page titles, headers, and content.
2. Creating high-quality content that provides value to users.
3. Optimizing images with alt tags and descriptive filenames.

The timeline varies depending on the complexity of the project. A simple website may take a few weeks, while larger projects with custom features or e-commerce functionality can take several months. Clear communication and adherence to the project timeline can help streamline the process.

Costs depend on factors such as the complexity of the design, functionality requirements, integration of third-party services, and ongoing maintenance. It's important to discuss budget expectations and clarify all costs upfront to avoid surprises.