# Most Popular Product Guides

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><mark style="color:blue;"><strong>AI Model Hub</strong></mark></td><td>Learn about AI foundation models and document collections supporting Retrieval-Augmented Generation (RAG) use cases.</td><td><a href="ai/ai-model-hub">ai-model-hub</a></td></tr><tr><td><mark style="color:blue;"><strong>Managed Kubernetes Use Cases</strong></mark></td><td>Explore the key use cases of Managed Kubernetes.</td><td><a href="containers/managed-kubernetes/use-cases">use-cases</a></td></tr><tr><td><mark style="color:blue;"><strong>ionoscloud_certificate</strong></mark></td><td>Learn how to search for and return an existing certificate using Terraform.</td><td><a href="https://docs.ionos.com/terraform-provider/data-sources/certificate_manager_certificate">https://docs.ionos.com/terraform-provider/data-sources/certificate_manager_certificate</a></td></tr><tr><td><mark style="color:blue;"><strong>View MongoDB Clusters</strong></mark></td><td>Learn how to view a list of MongoDB clusters using DCD.</td><td><a href="databases/mongodb/how-tos/view-clusters">view-clusters</a></td></tr><tr><td><mark style="color:blue;"><strong>Manage TLS Certificates using IONOS Cloud DNS Webhook for</strong><strong> </strong><strong><code>cert-manager</code></strong></mark></td><td>Learn how to manage TLS certificates using the IONOS Cloud DNS Webhook for <code>cert-manager</code>.</td><td><a href="https://docs.ionos.com/cloud/tutorials/network-services/cloud-dns/certmanager-widget">https://docs.ionos.com/cloud/tutorials/network-services/cloud-dns/certmanager-widget</a></td></tr><tr><td><mark style="color:blue;"><strong>DBaaS MariaDB SDKs</strong></mark></td><td>Learn how to simplify integration with MariaDB database clusters and allow seamless utilization of IONOS Cloud DBaaS services using MariaDB SDKs.</td><td><a href="https://docs.ionos.com/reference/software-development-kits/sdks/mariadb-api-sdks">https://docs.ionos.com/reference/software-development-kits/sdks/mariadb-api-sdks</a></td></tr><tr><td><mark style="color:blue;"><strong>Reset your Database Password</strong></mark></td><td>Learn how to reset your MariaDB database password.</td><td><a href="databases/mariadb/troubleshooting/reset-db-password">reset-db-password</a></td></tr><tr><td><mark style="color:blue;"><strong>ionoscloud_vcpu_server</strong></mark></td><td>Learn how to create and manage IONOS Cloud vCPU server objects using Terraform.</td><td><a href="https://docs.ionos.com/terraform-provider/resources/vcpu_server">https://docs.ionos.com/terraform-provider/resources/vcpu_server</a></td></tr><tr><td><mark style="color:blue;"><strong>Security and User Management</strong></mark></td><td>Learn how to manage user groups for node pools.</td><td><a href="containers/managed-kubernetes/how-tos/security-and-user-management">security-and-user-management</a></td></tr><tr><td><mark style="color:blue;"><strong>Create a Backup Job</strong></mark></td><td>Learn how to create backup jobs with performance-optimized settings.</td><td><a href="storage-and-backup/ionos-object-storage/s3-tools/veeam-backup-and-replication/create-backup-job">create-backup-job</a></td></tr></tbody></table>