If you want to use the advance search box, then select Show Search Box from "Search & Filter" tab. It will appear a search box on your front-end table page. See this screenshot below:
If you want to search from a specific area. like this below screenshot:
then first you have to turn on "Advance Search" option from Configure page.
Now you can search from a specific area. As an example, suppose you want to search only from the post title and SKU then select post_title and _sku from "Search From". Also, you can search from other sections.
Also, you can search from taxonomy as well. Set which taxonomy you want to search in.
Finally, if you want to see the demo table click here.