There are many offer types: Sale, UpSale, Bundle, WholeSale, Motivator, Recommendation and Postsale.
Motivator is cart discount while the others are product discount.
Postsale is post-purchase while the others are pre-purchase.
1. Sale
Display a discount notification or widget when customers view product pages (scheduled sale, custom pricing)
Related links:
>> Demo link
>> Demo link
>> Create buy one get one free offer (BOGO)
2. UpSale
Display an upsale popup when customers add a trigger product to cart (buy X get Y)
For example buy a t-shirt then get discount 10% to buy a jean
Related links:
>> Add this product to cart to view upSale demo
3. Bundle
Display a bundle of products when customers view product pages
For example:
buy a t-shirt, a jean and pair of shoes to get 20% discount for all
buy a t-shirt, a jean to get a hat free
buy 3 t-shirts to get 1 free...
Related links:
>> Demo link
>> Bundles page
>> Create bundle of 3 or more product groups
>> Set up Mix & match for $amount
4. Wholesale
Quantity breaks - Tiered Pricing - Bulk Discount
Offer discount based on quantity
Related links:
>> Demo link
5. Motivator
Display a progress bar to motivate customers buy more (discount or gift for order above $amount)
Offer discount based on cart amount
Related links:
>> Clear your cart, then add this product to cart to view motivator demo
(In case there are some active motivators at the same time, the on-screen message change/update automatically to prompt people to reach the next level)
6. Recommendation
Display recommended products at the bottom or on the top bar or under the header of pages
Related links:
>> Demo link
>> Create a header bar with countdown
7. Postsale
Display a post purchase up-sale widget on thank you page
>> Demo link
There are some other instructions, please take a look at their titles.