Docs updates for HUB, YOLOv4, YOLOv7, NAS (#3174)

Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

docs/datasets/classify/caltech101.md

@@ -1,6 +1,7 @@
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 comments: true
 description: Learn about the Caltech-101 dataset, a collection of images for object recognition tasks in machine learning and computer vision algorithms.
+keywords: Caltech-101 Dataset, Object recognition tasks, Ultralytics YOLO Docs, training, testing, code snippets & examples, machine learning, computer vision
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 # Caltech-101 Dataset

docs/datasets/classify/caltech256.md

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 comments: true
 description: Learn about the Caltech-256 dataset, a broad collection of images used for object classification tasks in machine learning and computer vision algorithms.
+keywords: Caltech-256, Dataset, Object Recognition, Image Classification, Convolutional Neural Networks, SVMs, YOLO, Deep Learning Models
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 # Caltech-256 Dataset

docs/datasets/classify/cifar10.md

@@ -1,6 +1,7 @@
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 comments: true
 description: Learn about the CIFAR-10 dataset, a collection of images that are commonly used to train machine learning and computer vision algorithms.
+keywords: CIFAR-10 dataset, YOLO model training, image classification, deep learning, computer vision, object detection, machine learning, convolutional neural networks, Alex Krizhevsky
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 # CIFAR-10 Dataset

docs/datasets/classify/cifar100.md

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 ---
 comments: true
 description: Learn about the CIFAR-100 dataset, a collection of images that are commonly used to train machine learning and computer vision algorithms.
+keywords: CIFAR-100 dataset, CIFAR-100 classes, CIFAR-100 structure, CIFAR-100 applications, CIFAR-100 usage, YOLO model training, machine learning, computer vision
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 # CIFAR-100 Dataset

docs/datasets/classify/fashion-mnist.md

@@ -1,6 +1,7 @@
 ---
 comments: true
 description: Learn about the Fashion-MNIST dataset, a large database of Zalando's article images used for training various image processing systems and machine learning models.
+keywords: Fashion-MNIST, dataset, machine learning, image classification, convolutional neural networks, benchmarking, Zalando's article images
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 # Fashion-MNIST Dataset
@@ -75,4 +76,4 @@ The example showcases the variety and complexity of the images in the Fashion-MN
 
 ## Acknowledgments
 
-If you use the Fashion-MNIST dataset in your research or development work, please acknowledge the dataset by linking to the [GitHub repository](https://github.com/zalandoresearch/fashion-mnist). This dataset was made available by Zalando Research.
+If you use the Fashion-MNIST dataset in your research or development work, please acknowledge the dataset by linking to the [GitHub repository](https://github.com/zalandoresearch/fashion-mnist). This dataset was made available by Zalando Research.

docs/datasets/classify/imagenet.md

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 comments: true
 description: Learn about the ImageNet dataset, a large-scale database of annotated images commonly used for training deep learning models in computer vision tasks.
+keywords: ImageNet, dataset, deep learning, computer vision, YOLO models, training, object recognition, image classification, object detection, WordNet, synsets, ILSVRC
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 # ImageNet Dataset

docs/datasets/classify/imagenet10.md

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 comments: true
 description: Learn about the ImageNet10 dataset, a compact subset of the original ImageNet dataset designed for quick testing, CI tests, and sanity checks.
+keywords: ImageNet10 dataset, ImageNet, small scale, subset, computer vision models, pipelines, testing, debugging, synsets, annotations, applications, structure, sample images, citations, acknowledgments, Ultralytics Docs
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 # ImageNet10 Dataset

docs/datasets/classify/imagenette.md

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 ---
 comments: true
 description: Learn about the ImageNette dataset, a subset of 10 easily classified classes from the Imagenet dataset commonly used for training various image processing systems and machine learning models.
+keywords: ImageNette Dataset, ImageNette, training set, validation set, image classification, convolutional neural networks, machine learning, computer vision, ultralytics, yolov8n-cls.pt, python
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 # ImageNette Dataset

docs/datasets/classify/imagewoof.md

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 comments: true
 description: Learn about the ImageWoof dataset, a subset of the ImageNet consisting of 10 challenging-to-classify dog breed classes.
+keywords: ImageWoof dataset, dog breed images, image classification, noisy labels, deep learning models, CNN training, fastai
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 # ImageWoof Dataset

docs/datasets/classify/index.md

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 comments: true
 description: Learn how torchvision organizes classification image datasets. Use this code to create and train models. CLI and Python code shown.
+keywords: image classification, datasets, format, torchvision, YOLO, Ultralytics
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 # Image Classification Datasets Overview

docs/datasets/classify/mnist.md

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 comments: true
 description: Learn about the MNIST dataset, a large database of handwritten digits commonly used for training various image processing systems and machine learning models.
+keywords: MNIST, EMNIST, dataset, handwritten digits, convolutional neural networks, support vector machines, machine learning, computer vision, image processing, benchmark data, Ultralytics
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 # MNIST Dataset