Web design and development services refer to the process of creating, building, and maintaining websites. This includes a variety of different services that can range from the very basic design of a single static page of plain text to complex web-based internet applications, electronic businesses, and social network services. Here are some of the key services that are typically offered by web design and development companies:

1. Web Design:
– Custom website design or redesign
– Responsive/mobile-friendly design
– User interface (UI) design
– User experience (UX) design
– Graphic design including logos and branding
– Wireframing and prototyping

2. Web Development:
– Front-end development (HTML, CSS, JavaScript, and frameworks like React, Vue.js, Angular)
– Back-end development (server-side scripting, database design, API development with languages like PHP, Ruby, Python, Node.js)
– Content Management System (CMS) development and customization (WordPress, Joomla, Drupal, etc.)
– E-commerce development (Shopify, Magento, WooCommerce, etc.)
– Progressive Web App (PWA) development

3. Website Maintenance:
– Ongoing website updates
– Security monitoring and updates
– Performance optimization
– Search Engine Optimization (SEO)
– Content updates and management
– Regular backups and disaster recovery

4. Hosting and Domain Services:
– Website hosting setup and management
– Domain registration and management
– Email hosting and setup

5. Digital Marketing:
– Search engine optimization (SEO) to improve visibility in search engines
– Content marketing strategy and creation
– Social media management and advertising
– Pay Per Click (PPC) advertising setup and management
– Email marketing campaign design and distribution

6. Accessibility:
– Ensuring that websites comply with accessibility standards (WCAG, ADA)
– Testing for and implementing features to assist users with disabilities

7. Analytics and Reporting:
– Setup of website analytics (Google Analytics, etc.)
– Custom reporting and data analysis
– Conversion rate optimization

When seeking web design and development services, clients may look for comprehensive solutions that include all the above elements or they might need specific, standalone services depending on their business requirements. Good web design and development not only provide an attractive aesthetic but also ensure that the website is functional, easy to use, accessible to all users, performs well on all devices, and is optimized for search engines.