Kaggle allows users to find and publish data sets, explore and build models in a web-based data-science environment, work with other data scientists and machine learning engineers, and enter competitions to solve data science challenges. Kaggle is the world's largest community of data scientists and machine learners.
Kaggle got its start in 2010 by offering machine learning competitions and now also offers a public data platform, a cloud-based workbench for data science, and Artificial Intelligence education.
Kaggle’s services include:
Machine learning competitions: this was Kaggle's first product. Companies post problems and machine learners compete to build the best algorithm, typically with cash prizes.
Kaggle Kernels: a cloud-based workbench for data science and machine learning. Allows data scientists to share code and analysis in Python, R and R Markdown. Over 150K "kernels" (code snippets) have been shared on Kaggle covering everything from sentiment analysis to object detection.
Public datasets platform: community members share datasets with each other. Has datasets on everything from bone x-rays to results from boxing bouts. Kaggle Learn: a platform for AI education in manageable chunks.
According to en.wikipedia