The introduction section of the company business plan is used for the purpose of summarizing the entire business and it is different aspects such as the product/services, the operation and any goals or deadlines that you may want to achieve.  It also lists the major benchmarks that you want to achieve in the given timeframe.  In order to make an introduction to your business plan you can have a simple cover sheet which lists the basic details of your business such as data establishment, address and other of contact details and the objective of the business.  You can further elaborate the introduction to include a sort of an index of all the other contents of your business plan.  If summarizing the entire aspect of the business in terms of the product operation, marketing or finance, you can list the various different headings and subtopics in the introduction so that you know where to find what information at the time that you needed.

You can further extend the scope of the introduction section by speaking about your business as a whole.  This is usually done in tune with how you think about your business in your mind.  Your aspirations, goals, and the strategy that you may want to deploy can all be listed here.  The concept that you have for your business in terms of the product or service that you want to provide and how you visualize this service is growing over the years should also be a part of this section.  Any important and key issues that are crucial to the establishment and growth of your business can be summarized here.  Different aspects of your business such as details of your competitors, your marketing tactics and also the financial requirements can be mentioned in this section of the business plan.  Any research that has been done by you regarding the field in which you are going to be operating your business can be mentioned here for an easy future reference.
Since this is a summarization of the entire business and the business plan you can mention any and all important and relevant facts in this section.