A well structured website with SEO will be shown according to the "keyword" entered in the search field on the Google site.
If you search the term "buy clothes" or cheap clothes, for example will be shown the page that is written clothing in your url.
You can optimize each page individually and put key words different from the url, for example: user can search for "jeans" and Google direct to your url meusite.com.br/produtos?tipo=roupa
.
However there are a number of factors that influence a search, one of the most important are sponsored links, which works on the same logic explained above, also known as Google Adwords and has a manageable cost.
Depending on the ecommerce platform that is used to sell your products, you will find various optimization plugins for your pages and products.
Google also offers a number of tools for optimizing your site.
Some link:
PageSpeed
, GoogleWebMaster ,
Google Analytics ,
Schema.org .
There is much more, worth studying each one of them ...
Also worth noting is that a good SEO system works well as long as the site is responsive, that is, it has a version for mobiles and tablets.