A technical writer is a professional who specializes in creating communication materials that are highly informative, technical, and easy to understand. This is critical for companies that produce highly technical products or provide technical services to a range of clients. A technical writer’s job is to ensure that communication about a company's products and services is clear, concise, and accurate.

A technical writer helps take complex information and turns it into documentation that is easy to understand for both technical and non-technical users. Technical writers create materials such as user manuals, specifications, training manuals, and online help systems. More advanced technical writers also write scripts for videos and multimedia presentations.

But why is it important for companies to have a technical writer readily available? The answer is simple – technical writing plays a critical role in ensuring that a company's products and services are easily understood and effectively used by customers. If communication materials are poorly written, customers may become frustrated and may not use the product or service to its full potential. Poorly written documentation can also result in legal issues if important information is not clearly communicated, leading to product misuse and customer dissatisfaction.

In addition to providing quality documentation, a technical writer can also help to streamline the development process for new products and services. By working closely with engineers, product managers, quality assurance, and other stakeholders, a technical writer can ensure that documentation is created during product development, rather than after it is released. This can help avoid costly delays and ensure that documentation is ready and available when the product is released. However, this can be hard for a technical writer who supports more than one or two development teams. 

Overall, a technical writer is an important asset for companies that produce complex products or provide technical services. They help to ensure that communication materials are clear, concise, and accurate, making customer satisfaction a top priority.