How to create a Custom Unsubscribe Page which have a certain Items and the user just select items which want to unsubscribe !!

Hi @Ferdouus_Kazemi and welcome to the Community!

This use case could be accomplished by using a custom Preference Page to update profile properties, and then building segments based on those properties:

1. Navigate to Account > Settings > Email Preference & Subscription > Edit Page​​​​​​:

   

2. Once you’re in the Page Editor, you can click Add Blocks and then drag an input field into the page (for your use case, I recommend the Multi Checkbox).
    
3. Format the checkbox to take property updates. You can create custom properties here as well:

   

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4. Once the page is formatted to your liking, you can include the  {% manage_preferences %}  tag in your email which will allow recipients to reach this page.
    

5. To embed this preference page on a full page on your website, you would have to utilize a custom hosted preference page. This feature does require knowledge of coding to create and place a custom preference page on your website. You can read more about custom hosted pages within our Create a Custom Preference Page help doc. 
   
   To use a custom hosted preference page, you would have to go to Accounts > Domains and Hosting and enable custom pages, as outlined in our How to Enable Hosted Pages doc.
   
   This may require help from a developer, and you’re always welcome to reach out to one of our wonderful Klaviyo Partners if you’d like more in-depth assistance.
    

6. Now, you can create Segments based on the profile properties that you included in the checkbox. This way, customers will be divided in real-time depending on their preferences:
    

   

   Keep in mind, you won’t be able to create a segment for a specific property until at least one person has been assigned that property by filling out a preference/signup form.
    

7. Now, you can email these segments with the content that aligns with each property.
    

More on this topic can be found in this Community thread:

I hope this helps, and thanks for using the Community!

- Brian