In a small bowl, dissolve the sugar in warm water. Sprinkle the yeast over the water and let it sit for about 5 minutes, or until it becomes foamy.
In a large mixing bowl, combine the flour and salt. Create a well in the center and pour in the yeast mixture and olive oil.
Stir the ingredients together until a sticky dough forms. Transfer the dough onto a lightly floured surface and knead for about 10 minutes, or until the dough becomes smooth and elastic.
Place the dough in a greased bowl and cover it with a clean kitchen towel. Allow the dough to rise in a warm place for about 1 hour, or until it doubles in size.
Once the dough has risen, punch it down to release any air bubbles. Transfer it to a greased baking sheet and flatten it with your hands to create a rectangular shape.
Using your fingers, gently press indentations into the dough. Drizzle olive oil over the top and sprinkle with salt. If desired, sprinkle fresh herbs over the dough for added flavor.
Let the dough rise for an additional 30 minutes, allowing it to become slightly puffy.
Preheat your oven to 220°C (425°F). Bake the focaccia for 20-25 minutes, or until it turns golden brown.
Remove the focaccia from the oven and let it cool for a few minutes before slicing and serving. Enjoy!