Content writing is a form of online writing which is closely linked to web marketing campaigns. This means creating the writing which appears on websites that are designed to sell or promote a specific product. Content writers work according to the brief provided fby a client.A website content writer or web content writer is a person who specializes in providing relevant content for websites. Every website has a specific target audience and requires the most relevant content to attract business. Content should contain keywords aimed towards improving a website's SEO.