You can't guarantee how your customers will search for items, so be creative. The best searchable listings follow these rules:

Use as many searchable keywords as possible (for example: 2, two, II)

Use a format of keyword [space] keyword [space] keyword

Create a search-effective title, for example: "14K Gold Vintage Elgin Pocket Watch 1907 Antique" has plenty of effective search keywords.

Avoid ineffective titles, such as:L@@K best watch on eBay...Wow! The only searchable word is "watch," and there are thousands of listings with "watch" in the title on eBay.