For example, you might test:
- A digital customer journey
- Design drafts
- Prototypes (on for example Invision, proto.io or Axure)
- Landing Pages
- Online Stores
- Promo material
- Reactions to pictures, videos or music
- Business concepts
- How your users search for your product/service online
- Social media content
- Print advertisements
- Customer Support Services
- Competitors
- Games
These are just some ideas to get you started!