a

True. It is wise to optimize the store for SEO and then submit to search engines for crawling. If we neglect the SEO practice for a long time and search engines already index the parametric pages; it can result in delays indexing new SEO optimized pages in good positions in search engines.

b

True. SEO URLs for categories work according to All-or-Nothing principle. This is especially true for category-subcategory relations. Forgetting to apply SEO keyword for a single category can break the store category navigation.