The end-user experience is more successful when you have high-quality written materials. Poor or non-existent user manuals will alienate your customers, inadequate on-line help wastes a user's valuable time and support that is not available immediately, or slow in coming, will frustrate your customers. As a result, your software brand suffers.
Good documentation will reduce your support costs. Every solution that your user finds in the user guide or online help means one less call or email to your support desk. Your support team can then concentrate on finding answers to real problems, rather than explaining to a customer how to operate a computer program.
Your products will attain longevity. Clearly written instructions can prevent customer errors and make business processes more reliable. The sooner your customer gains benefit from your product the longer they will use it and not be hindered by it. As a result, your software brand benefits.
Improved sales result from the availability of easy-to-use product information. As a result, agreement is reached on system functionality between IT staff and client business departments thus finalising system and user documentation.
Free usability testing of your software product. The process of documenting a software application can also reveal functional and UX problems and lead to their correction. To produce complete user documentation all options of a software system is essentially tested at a presentation and usability level.