Charities are often in the same league as university and government websites when it comes to domain authority and trust. Links from authoritative sites, such as these, are still one of the biggest factors for ranking high in the SERP's. A link will not only help your link profile, it will also benefit your company's brand, helping to associate it with good causes. Volunteering also has indirect benefits. It can be used as a newsworthy story for a press release,