Here are some of the best advertising sign uses:

1. Promoting sales and discounts: Signs are a great way to promote sales and discounts, as they can be eye-catching and quickly communicate the message.

2. Branding and identity: Signs can help to build brand awareness and identity by displaying logos, slogans, and other branding elements in a prominent and consistent way.

3. Directional signage: Signs can be used to help direct customers to a business, parking lot, or specific location within a building.

4. Event promotion: Signs can be used to promote events such as concerts, festivals, and trade shows, helping to build awareness and generate excitement.

5. Informational signage: Signs can be used to provide important information to customers, such as store hours, policies, and safety information.

6. Directional: Signs can be used to help guide customers through complex or unfamiliar spaces, such as malls, airports, and hospitals.

7. Menu boards: Signs can be used as menu boards in restaurants and cafes, displaying items and prices in an easy-to-read format.

8. Real estate signage: Signs can be used to promote real estate properties for sale or lease, providing essential information and helping to attract potential buyers or renters.

9. Vehicle wraps: Signs can be used as vehicle wraps, turning cars, trucks, and vans into moving billboards that can reach a wide audience.

10. Environmental graphics: Signs can be used to create environmental graphics, transforming spaces such as offices, lobbies, and public areas into engaging and informative environments that reflect a business's brand and identity.
    

Overall, signs are an effective and versatile advertising tool that can be used in a wide range of contexts to communicate messages, build brand identity, and engage with customers.