How to
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PubNub portal
Enabling Persistence
Follow this how-to to enable Persistence in the Admin Portal to persist all messages as they're published.
![Telehealth Tutorial cross-platform Multiple devices showing a telemedicine chat application with conversations between doctors and patients.](https://www.pubnub.com/cdn/3prze68gbwl1/YImhMz8bJU4tjn1gXtryj/65e6df2e74858ef07bb70088dde5f026/18-new2.png?w=360&h=200&fit=)
Chat
How to Build Cross-Platform Chat Applications with PubNub
If your team is developing a cross-platform application you have a number of options to choose from but whichever approach you take, from web-only to cross-platform frameworks, PubNub can easily incorporate chat into your app.
![How-to Build Vue Chat Apps](https://www.pubnub.com/cdn/3prze68gbwl1/3unV0nzOBgNrauUqfluAd7/9b623bcba4978b74233e305899d71c9a/How-to-Build-a-Chat-App_1200x630_-1.png?w=360&h=200&fit=)
Chat
How to build a chat app using HTML, CSS, Vue, & JS
Read our complete guide to build a chat app using HTML, CSS, Vue, and JS. Read this and our other information building interactive chat apps.
![portal keys 1200x630](https://www.pubnub.com/cdn/3prze68gbwl1/277sONprYeNVYSuzYIQIl/588db45740693bf838bfd57410c83073/Screen_Shot_2022-07-26_at_1.58.46_PM.png?w=360&h=200&fit=)
PubNub portal
Creating Keys
Follow this how-to on creating keys in the Admin Portal to connect your application to the PubNub network.
![portal files 1200x630](https://www.pubnub.com/cdn/3prze68gbwl1/5iVmmebixdKkFUcjz6ZnP9/370b7313bcb82b0ad9131a233b3c5060/Screen_Shot_2022-07-26_at_1.59.21_PM.png?w=360&h=200&fit=)
PubNub portal
Enabling Files
Follow this how-to on enabling Files in the Admin Portal to upload and share files.
![portal objects 1200x630](https://www.pubnub.com/cdn/3prze68gbwl1/5QQiQ80on4lKqvWQOBVBJ9/ba62ac7bce1f296d435f9a72e2550664/Screen_Shot_2022-07-26_at_1.59.09_PM.png?w=360&h=200&fit=)
PubNub portal
Enabling Objects
Follow this how-to on enabling Objects in the Admin Portal to to store metadata for users, channels, and memberships without the need of setting up your own database.
![PubNub How-To's: Push Notifications 1200x630](https://www.pubnub.com/cdn/3prze68gbwl1/1zqaCINwvSnFLDqq2uPlNx/f122a8441c2321d971b88cd81fb36e2e/Screen_Shot_2022-06-06_at_4.00.06_PM.png?w=360&h=200&fit=)
Push Notifications
Push Notifications
Follow this how-to to learn more about how you can leverage push notifications in your application to better keep your users engaged and informed.
![Real_Time_Geolocation_1200x630.jpg Real_Time_Geolocation_1200x630.jpg](https://www.pubnub.com/cdn/3prze68gbwl1/CcwAhmNWk9ti8Qcu9sNSf/7a69c45170e28cddb6733ce8d63cb2af/Real_Time_Geolocation_1200x630.jpg?w=360&h=200&fit=)
Geolocation
How to Explore Real-time Geolocation Solutions
This how-to will explain real-time geolocation services for developers, what to consider while building geolocation features, and how PubNub can make it easy to stream and use real-time location data.
![How to IoT solution How to IoT solution](https://www.pubnub.com/cdn/3prze68gbwl1/1j4Pq5McvTKNuAskKp3b9d/4b6ca952794e75eb86eb960f762d08d4/How_To_Develop_an_IoT_Solution_with_PubNub.png?w=360&h=200&fit=)
IoT
How to develop an IoT solution with PubNub
Learn how to develop an IoT solution with PubNub, allowing you to monitor and control a global fleet of IoT devices in real-time