Again, watch out for over-optimization. Often pointing to the same web page, will no longer be considered natural by search engines and can be harmful to your SEO.
Quality not quantity
The purpose of internal linking is not to b2c cell phone number list add a large number of links to a web page, but to add internal links that add to the quality of your content.
For example, a blog article comprising only 2 or 3 correctly positioned links, pointing to coherent content providing useful information to the reader will be more effective in terms of SEO, than a blog article proposing a link every 10 words which does not ultimately add much to the content.
This kind of practice can also be seen as SEO over-optimization by search engines and therefore be penalizing.