First of all, check whether the navigation is actually helping the users to navigate through the site. An online e-commerce store is the best example in which moving between different product categories is difficult, and breadcrumbs help in proper organisation and provide an opportunity to quickly navigate the site.
That’s why breadcrumbs should be easily visible and as a rule, they are located at the top of the page. A navigation guide is not mandatory but the most important element on the site. It should be an unobtrusive assistant. The sequence is important – if you enter this type of navigation on one page, you should use it on your entire site.
While implementing breadcrumbs navigation make sure that all the elements are well structured logically and connected together. Breadcrumbs proper use will enhance SEO and encourage users to explore those areas of the website which are important for you. This navigation is the key for Google in the structure of the website and can contribute to the SEO efforts.