Update FAQ.md

Author: FabioLuporini

FAQ.md

@@ -40,13 +40,25 @@
 
 
 ## What is Devito?
-Devito isn’t a ready-made library of seismic or wave solvers—it’s a symbolic DSL and code-generation framework for discretizing and solving arbitrary partial differential equations (PDEs). Rather than shipping you a fixed suite of “pre-canned” simulators, Devito, in short, lets you:
+Devito is a Python-based domain-specific language (DSL) and code generation framework for solving any system of partial differential equations (PDEs) through symbolic computation. Instead of bundling fixed “black-box” solvers, Devito empowers you to build your own, tailored to your physics and your hardware.
 
-* Express your PDEs in Python using concise, SymPy-based syntax.
-* Automatically generate highly optimized C (and parallel MPI/OpenMP/OpenACC/CUDA/HIP/SYCL) kernels behind the scenes.
-* Compose your own finite-difference or other stencil schemes to target whatever physics you need—acoustics, elasticity, electromagnetics, you name it.
+Here’s what Devito brings to the table:
 
-Yes, we include example scripts (e.g. an elastic wave solver with a free-surface boundary) to demonstrate how to build a working simulator, but those are just examples—starting points to show you how to leverage Devito’s abstractions. The engine itself has no built-in “knowledge” of waves or seismics; that lives entirely in the numerical methods you implement on top of it.
+1. **Symbolic PDE definitions in pure Python**  
+   Express your governing equations exactly as you would on paper, using a concise, SymPy-powered syntax—no boilerplate, no glue code.
+
+2. **Automatic generation of fast, low-level code**  
+   Devito turns your high-level symbolic equations into highly optimized C/C++ code.
+
+3. **Portable performance across architectures**  
+   From laptops to supercomputers: Devito targets multi-core CPUs (with OpenMP and MPI) and accelerators (CUDA, HIP, SYCL, OpenACC, and MPI) from the same source. GPU support for CUDA, HIP, and SYCL is included in [DevitoPRO](https://www.devitocodes.com/features/).
+
+4. **Custom finite-difference and stencil design**  
+   Design bespoke numerical schemes for acoustics, elasticity, electromagnetics, fluid dynamics—or whatever PDE-driven physics your research demands.
+
+While Devito is often associated with seismic imaging, that’s just one application domain. Our RTM and FWI examples use Devito under the hood, but the engine itself is physics-agnostic. There’s no built-in assumption about waves, seismics, or domains—you provide the physics, and Devito delivers efficient, architecture-aware implementations.
+
+Focus on modeling and math—Devito handles the performance.
 
 
 ## How can I see the code generated by Devito?