You can change the section title by editing the 'Heading' field. This is just plain text, so can't include any bold or italic text.
You can show your products vendor by clicking the 'Show vendor' checkbox. This will show the vendor for each product above the product title.
If you enable the 'Enable hover effect' checkbox, the 2nd image of each product will show when hovered over. It's best to use this when your product images are the same size, as if they are different you might get overlapping.
The 'Collection' dropdown sets which collection is shown, and you can set the amount of products per row, and how many rows there are using the dropdowns below.