docs(memfault): suggest Memfault in NCS docs

### Summary Mention Memfault in the top-level NCS page, device pages, and debugging page. The `:ref:` links point to [Memfault's integration page](https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/external_comp/memfault.html) in the NCS docs. ### Test Plan - [ ] Build the docs --- Resolves: MCU-377
memfault · Apr 19, 2024 · 2aae9b3 · 2aae9b3
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diff --git a/doc/nrf/device_guides/nrf52.rst b/doc/nrf/device_guides/nrf52.rst
@@ -56,6 +56,9 @@ Zephyr and the |NCS| provide support and contain board definitions for developin
 
 See also :ref:`ug_radio_fem_nrf21540ek` to learn how to use the RF front-end module (FEM) with the nRF52 Series devices.
 
+For remote monitoring of fleets running an nRF52 Series SiP, explore :ref:`Memfault <ug_memfault>`.
+The nRF Connect SDK includes out-of-the-box metrics collected with Memfault for monitoring Bluetooth connectivity such as connection time and Bluetooth thread stack usage.
+
 .. note::
     Despite being supported in :ref:`Zephyr <zephyr:thingy52_nrf52832>`, the |NCS| does not support `Nordic Thingy:52`_.
 

diff --git a/doc/nrf/device_guides/nrf53.rst b/doc/nrf/device_guides/nrf53.rst
@@ -27,6 +27,9 @@ Zephyr and the |NCS| provide support and contain board definitions for developin
      - ``thingy53_nrf5340``
      - `Hardware Specification <Nordic Thingy:53 Hardware_>`_
 
+For remote monitoring of fleets running an nRF53 Series SiP, explore :ref:`Memfault <ug_memfault>`.
+The nRF Connect SDK includes out-of-the-box metrics collected with Memfault for monitoring Bluetooth connectivity such as connection time and Bluetooth thread stack usage.
+
 .. toctree::
    :maxdepth: 2
    :caption: Subpages:

diff --git a/doc/nrf/device_guides/nrf70.rst b/doc/nrf/device_guides/nrf70.rst
@@ -91,6 +91,8 @@ The following nRF70 Series shields are available and defined in the :file:`nrf/b
 
 Applications can be developed on the nRF7002 DK (PCA10143), which includes the nRF7002 companion IC, or on boards compatible with the nRF7002 EK (PCA63556) or the nRF7002 EB (PCA63561).
 
+For remote monitoring of fleets running an nRF70 Series SiP, explore :ref:`Memfault <ug_memfault>`.
+
 .. toctree::
    :maxdepth: 2
    :caption: Subpages:

diff --git a/doc/nrf/device_guides/nrf91.rst b/doc/nrf/device_guides/nrf91.rst
@@ -43,6 +43,9 @@ For more advanced topics related to the nRF9161 DK, see the :ref:`ug_nrf9161` do
 
 If you want to go through a hands-on online training to familiarize yourself with cellular IoT technologies and development of cellular applications, enroll in the `Cellular IoT Fundamentals course`_ in the `Nordic Developer Academy`_.
 
+For remote monitoring of fleets running an nRF91 Series SiP, explore :ref:`Memfault <ug_memfault>`.
+The nRF Connect SDK includes out-of-the-box metrics collected with Memfault for monitoring LTE connectivity such as total bytes sent and received, the network operator, frequency band, and signal quality measurements.
+
 .. toctree::
    :maxdepth: 2
    :caption: Subpages:

diff --git a/doc/nrf/index.rst b/doc/nrf/index.rst
@@ -24,11 +24,15 @@ Robust connectivity support
   The |NCS| supports a wide range of connectivity technologies.
   In addition to connectivity technologies :ref:`provided by Zephyr <zephyr:connectivity>`, such as Bluetooth® Low Energy, IPv6, TCP/IP, UDP, LoRa and LoRaWAN, the |NCS| supports ANT, Bluetooth Mesh, Apple Find My, LTE-M/NB-IoT/GPS, Matter, Amazon Sidewalk, Thread, and Wi-Fi®, among others.
 
+IoT fleet observability
+  The |NCS| provides a integration with :ref:`Memfault <ug_memfault>`, an observability platform for IoT devices with debugging, monitoring, and OTA.
+  In addition to crash reporting, Memfault provides out-of-the-box metrics for Nordic devices with Bluetooth and Cellular connectivity.
+
 Scalable and extensible
   The |NCS| is out-of-tree ready and can be used for projects and applications of all sizes and levels of complexity.
 
 Third-party integrations
-  The |NCS| provides integrations with third-party and Nordic products within the SDK, such as AWS, nRF Cloud, Memfault, and more.
+  The |NCS| provides integrations with third-party and Nordic products within the SDK, such as AWS, nRF Cloud, and more.
 
 Varied reference designs
   The |NCS| comes with advanced hardware reference designs for different use cases, ranging from nRF Desktop for Human Interface Devices to nRF5340 Audio for audio devices based on Bluetooth LE Audio specifications.

diff --git a/doc/nrf/test_and_optimize/debugging.rst b/doc/nrf/test_and_optimize/debugging.rst
@@ -133,6 +133,14 @@ Use the following steps to enable monitor-mode debugging in the |NCS|:
 
 For more information about monitor-mode debugging, see Zephyr's :ref:`zephyr:debugmon` documentation and SEGGER's `Monitor-mode Debugging <Monitor-mode Debugging_>`_ documentation.
 
+Remote Debugging with Memfault
+******************************
+
+To collect coredumps from a remote device that has been deployed to the field, enable :ref:`Memfault <ug_memfault>`.
+Memfault collects device state at the time of a crash for debugging crashes remotely.
+Additionally, you can use Memfault to collect metrics for monitoring device health, including battery life, memory usage, and CPU usage.
+For more information on enabling Memfault for your project, see :ref:`ug_memfault`.
+
 Other debugging tools
 *********************