From Year 2 (after the first rollover) you can choose to invest in a number of Brand Promotion promotions.
Brand Promotion makes customers aware of your company and its products (in addition to your product advertising), and gives you the option to position yourself as an ethical manufacturer. This is especially cost effective when your firm has multiple products.
Brand Promotion is available under the Marketing menu:

Brand Ambassadors
Brand Ambassadors are well known celebrities, sports people, or social media stars who are paid to endorse and promote your brand to their fans or followers in a positive way.
You can choose one or more of the four available influencers.

Investment in Brand Ambassadors increases your company’s Awareness rating. This can be tracked on your Market Summary report.
Event Sponsorship
Investment in Event Sponsorship places your brand in front of those attending local,
state, or national events.

Investment in Event Sponsorship increases your company’s Awareness rating. This can be tracked on your Market Summary report.
Social Responsibility
Social Responsibility choices create positive change for the people in your community and for the environment. You can choose one or more of these options:

Investment in Social Responsibility increases both your company’s Corporate Social Responsibility (CSR) and Awareness rating, although they are less effective at increasing Awareness than Brand Ambassadors and Event Sponsorship.
Social Responsibility expenditure combines with your Sustainable Manufacturing
expenditure to give your CSR Rating. This can be tracked on your Market Summary report.