TL;DR

Keep 2 types of salt in the kitchen

1 - Cheaper one (Kosher salt, or a fine refined sea salt) for marinades, waters, rubbing, every day cooking

2 - More expensive textured salt (Maldon sea salt) for finishing foods

Table salt - Granular, flows well, small dense and strong, iodine added (metallic taste). anticaking agents

Kosher Salt - cheap, all rounder salt

Sea Salt - Thick flakey salt, expensive but great texture for finishing

Rock salt

When to salt

how much

All salt comes from the sea