update readme

README.md

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 ### Dataset Summary
 
-This dataset card aims to be a base template for new datasets. It has been generated using [this raw template](https://github.com/huggingface/huggingface_hub/blob/main/src/huggingface_hub/templates/datasetcard_template.md?plain=1).
+This dataset contains more than 2.1 million negative user reviews (reviews with 1 or 2 ratings) from 9869 apps across 48 categories from Google Play. Moreover, the number of votes that each review received within a month is also recorded. Those reviews having more votes can be cosidered as improtant reviews.
 
 ### Supported Tasks and Leaderboards
 
-[More Information Needed]
+Detecting app issues proactively by identifying prominent app reviews.
 
 ### Languages
 
-[More Information Needed]
+English
 
-## Dataset Structure
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-### Data Instances
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-### Data Fields
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-### Data Splits
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-## Dataset Creation
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-### Curation Rationale
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-[More Information Needed]
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-### Source Data
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-#### Initial Data Collection and Normalization
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-[More Information Needed]
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-#### Who are the source language producers?
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-[More Information Needed]
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-### Annotations
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-#### Annotation process
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-#### Who are the annotators?
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-### Personal and Sensitive Information
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-## Considerations for Using the Data
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-### Social Impact of Dataset
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-[More Information Needed]
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-### Discussion of Biases
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-[More Information Needed]
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-### Other Known Limitations
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-## Additional Information
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-### Dataset Curators
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-[More Information Needed]
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-### Licensing Information
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-### Citation Information
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-### Contributions
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-[More Information Needed]
+## How to use the dataset?