On Pinterest, it's important to work on the profile description, incorporating keywords in the first few lines (the visible part).
The banner should be of good quality and match your store's banner.
In the profile, you should of course fill in your store's web address (this will please Google a lot) and also that of your Instagram account. It's even possible to link these accounts, so every post published on Instagram will be saved as a pin. Beware, its url will be that of the instagram post, which is of little interest: better to replace it with a link to your store.
Your account can show only your own products divided into different "tables" and even sub-tables (by color, for example).
In 2025, there's no point in reposting other pins (unless you're looking to have a table recognized as a reference by Google, which will highlight it in its responses, but that's a whole other job).
You also need to take care with the description of each table and incorporate the right keywords.