A CLassic Remstered.
Where to begin with Skyrim SE?
Let us Start with the Big one, Graphics.
With the upgrade from 480p (SD) to 1080p(HD) for its textures and lighting effects you can immediately see a major difference between LE and SE with every thing from rocks to armor to your weapons looking better.
With the way light filters through Trees, Ruins, And Holes In Caves the addition of Volumetric God Rays Brings a whole new level of immersion.
With the Screen Space Reflection Lighting sources give of more realistic light instead of a area of light like the Older Version.
The new Water Shaders are nice but not as good of mods such as Pure Waters.
Speaking of Mods lets talk about them.
With the addition of Native Support for modding via the Mod Browser, Skyrim Modding is more accessible than ever.
When it comes to Heavier Modding you will require SKSE which the Steam version Thankfully has Support For, Unlike The Windows 10 Version.
Now, onto some Niche things.
If you were familiar with LE Console Commands you will be happy to hear that they are the Same as they were.
If you expected bugs from LE to be fixed in SE you will be disappointed to hear that most did not get fixed.
So to summarize, With all the the graphical updates and and minor bug fixes along with the increased modding capability's SE is a worthy Upgrade to Skyrim and even at full price is worth it, But on CDKeys You can find it commonly for less than 15$ or the equivalent in other currency.
So whether your New to The Skyrim Or A Skyrim Vet SE is the best way to play it.