Some offer scholarships because they need educated workers to come work for them, so this is an incentive to get future employees. Offering scholarships also makes a company look good to the community, like they are giving back. Scholarships also provide a tax break to these businesses. Rather than give the money to the government in the form of taxes, they give it to student who will instead have to pay the tax on that money. Since students tend to be lacking in funds, they generally don t have to pay much tax on the money, if they have to pay any at all.
Some scholarships are memorials for people who have made contributions to their profession.
This is a way of remembering them. The government may want an increase of professionals in specific areas.