If think you mean - having your company details on another website. The details must have the company name, address and phone number. This is called a 'citation' and the details must be consistently the same, on each website. Citations are important for local SEO and is a major factor in determing a company rankings in Google places. Directory listings of companies and their services are citations. Google scrapes details from directories and websites to determined the number of citations. There are other factors that determine Google Places rankings, like completeness of Google listings, claiming their business, testimonials etc, but citations is important.
We had a very similar thread to this yesterday. Please check out https://forums.digitalpoint.com/threads/what-is-seo-co-citation.2639440/ and if you have any further questions, it might be an idea to post them in there. Otherwise we're going to end up with multiple threads all containing the same info.