How to
![How-To: Building Collaborative Apps](https://www.pubnub.com/cdn/3prze68gbwl1/7k7dqDZYn6jT8Pudcvjs7g/ea3b2c6bd3250944a0089fb91b12a0ef/Screen_Shot_2022-08-30_at_11.33.57_AM.png?w=360&h=200&fit=)
Collaboration
Build Collaborative Applications
Follow this how-to and learn how you can build and power your real-time collaborative applications with PubNub.
![PubNub Portal How-To: Push Notifications for Android](https://www.pubnub.com/cdn/3prze68gbwl1/5TBAGKZp8xbaXNykvXpPoy/dab6198453019d1ccc2f6d34d382277a/Screen_Shot_2022-07-26_at_1.51.09_PM.png?w=360&h=200&fit=)
Push Notifications
Enabling Mobile Push Notifications: Android
Follow this how-to to enable PubNub's Mobile Push Gateway in the Admin Portal to send your Android users push notifications and alerts.
![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.
![PubNub Admin Portal How-to: iOS Push Notifications](https://www.pubnub.com/cdn/3prze68gbwl1/204HPoStJBbM1dSarijmBV/335ec7eb1491141c6ba3b37f3ecb0b0c/Screen_Shot_2022-07-30_at_9.03.29_AM.png?w=360&h=200&fit=)
Push Notifications
Enabling APNs Mobile Push Notifications
Follow this how-to to enable PubNub's Mobile Push Gateway in the Admin Portal to send your iOS users push notifications and alerts using APNs.
![Alexa Skills with PubNub Architecture Alexa Skills with PubNub Architecture](https://www.pubnub.com/cdn/3prze68gbwl1/YSdmLmTnXIRz2UWq5bJSz/62cbdd8ab096757634378abbb5848124/architecture.png?w=360&h=200&fit=)
Collaboration
How to call PubNub from Alexa
Amazon’s Echo is the market leading smart speaker and we see an increasing number of customers want to integrate Alexa into their PubNub solution