How tables are important for e-commerce product page?

Answer 1

Are you referring to a database table or an HTML table?

Virtually every e-commerce page on the planet is database driven, unless it is hand-written by a small company with products that rarely or never change. In that sense, tables are virtually a necessity for any serious site.

HTML tables, however, are considered obsolete. With the advent of CSS, you can create product tables that dynamically adjust the number of columns depending on the browser's client size. This minimizes horizontal scrolling that is required, and is considered the best design for any e-commerce site.

You should consider using tables only if the site's target audience are those that use only obsolete computers that do not run a modern browser, which is excessively rare.