Project pages are there for you to provide more information about the specific work you group does in the community. For example, you may have a project where you run a weekly meet up session for older people in the area and another project where you provide transport assistance to get your service users from A to B. In a case like this, you could create a separate project page for each service.
Project pages enable you to give your supporters up to date information about specific activities to boost your fundraising.
Project pages have their own unique url, so that you can easily send your supporters a link to keep them updated on your work.