How to reduce ping in big and detailed places?

I am working on a very detailed game that had no problems with ping lag before, but it started today when i have inserted a model that i made which is pretty detailed and contains a lot of parts, i wonder why did this happen and how could i stop it.

There is no one certain way to reduce lag but here are some tips.

• Use low detailed textures or smooth plastic
• Use streaming enabled located in 'workspace' properties
• Turn RenderFidelity on Unions/Meshes to "Automatic" instead of "Percise"
• For Unions/Meshes change the HitBox to something other than precise if you can
• Obviously Anchor parts that don't need to move
• Just try using lower poly meshes

Streaming enabled requires some knowledge about it so I would learn about it before you use it.