The city is unknown. Please enter a valid city.

Why
Don’t make the user guess why the error occurred. Use a validation text to tell the user what went and why it went wrong

Direct flights to Dublin are only available in August

Why
Simply describe the problem in the most service-oriented way and in a pleasant conversational tone, and then propose a solution.

City, airport, hotel name

Why
Defining categories helps reduce the choice range, enabling users to focus on the possibilities, and guiding them on the best way to use the field.

e.g. What’s the meaning of life, the universe, and everything?

Why?
Anwser and explain a complex idea.

Can’t rename “Photos” because a file with that name already exists. Please choose a different name.

Why
It explains: what the error is a rename error. why it happened because another file with that name exists. how the user can overcome it, by specifying a different name. The issue doesn’t turn into an insurmountable obstacle.

Your bag is empty.. Time to check out the new collection!

Why
Make it clear that the shopping cart is empty, and give the option for the users to navigate in the most common collections.

You don’t have any albums yet. Create albums to organize and share your photos.

Why
If you haven’t created any albums yet, they don’t just say “No Albums”, but rather tell you how albums can help you (organize and share your photos).

Shop curated collections

Why
Dive the users in a specific path to shop the collections.

You are you, Yay! Thanks for helping us keep your account secure.

Why
Success message upon completion of the security check is very short, but also surprising, funny, conveys a true sense of cooperation. Also, it tells the users how they benefited: by having a secured account.

To see item’s properties, tap on it

Why
When a sentence describes an objective and the action needed to achieve it, start the sentence with the objective.

Do you want to share with us other cool accessories that we haven’t thought about?

Why
Connect the sentence to the subject matter of the site

Hey, we recognize this email! Want to log in?

Why
Simply describe the problem in the most service-oriented way and in a pleasant conversational tone, and then propose a solution.

Thanks for helping out! Your feedback will make this feature better

Why?
After giving feedback on one of the product new features, they say what it actually means: You just improved the feature.

Create new album

Why
Encourage the users to go ahead and create his first album.

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