Sales promotions and campaigns are a great way to attract customers and boost sales in WooCommerce. Here are a few ways you can create effective promotions and campaigns within WooCommerce:

1. Percentage-based Discounts: Offer a certain percentage off on specific products or entire orders. For example, you can run a 20% off sale on all clothing items.

2. Fixed Amount Discounts: Offer a fixed dollar amount off on specific products or entire orders. For instance, you can offer $10 off on all electronics.

3. Buy One Get One (BOGO) Offers: Encourage customers to buy more by offering a free or discounted item when they purchase a specific product. For example, buy one shirt and get the second one at 50% off.

4. Free Shipping: Offer free shipping on all orders or set a minimum order amount for free shipping. This can incentivize customers to purchase more to qualify for free shipping.

5. Coupon Codes: Create unique coupon codes that customers can enter at checkout for discounts or freebies. You can distribute these codes through newsletters, social media, or other marketing channels.

6. Flash Sales: Offer limited-time discounts or special offers to create a sense of urgency. For example, you can run a 24-hour flash sale with 30% off on select items.

7. Loyalty Programs: Reward repeat customers by offering exclusive discounts or freebies based on their previous purchases. This can encourage customer loyalty and repeat purchases.

8. Email Marketing Campaigns: Send targeted emails to your customers with exclusive promotions and discounts. Use email automation tools to schedule and track the success of your campaigns.

9. Affiliate Programs: Partner with influencers, bloggers, or other websites to promote your products and offer them a commission for each sale they generate.

10. Social Media Contests: Run contests on social media platforms like Instagram, Facebook, or Twitter, where customers can enter to win a prize by sharing or commenting on your posts.

To implement these promotions and campaigns in WooCommerce, you can use various plugins and extensions like WooCommerce Dynamic Pricing, WooCommerce Coupon Generator, or WooCommerce Advanced Shipping. These plugins provide additional features and flexibility to create and manage your promotions effectively.