I think that it is necessary to turn to the experts. Now a lot of new sites are created, and all want to be in the top, so the competition and in this area is not strong. Especially if the resource advertising or selling, it is very important not only fast promotion in the beginning, and support “afloat” in the future. Look for a proven linkbuilding service or a company where SEO optimization specialists work. 

Many SEO specialists work for agencies that provide digital marketing services. Here, they optimize clients' websites to increase their visibility in search engines. Many SEO specialists choose to freelance, offering their services to various clients and projects. This allows them to flexibly manage their time and choose interesting projects.

You need to look for the one you need on the Internet.

It is professionals who should be engaged for quality SEO ortimization of websites. Nowadays, link building and crowd marketing specialists are mainly engaged in this. If you are still in search of a reliable company, order crowd marketing from Crowd Groups https://crowd-groups.com/en/ they apply a marketing method based on attracting and actively interacting with a wide audience of users to achieve marketing goals, using a unique platform and approach to crowd marketing where users can actively participate and influence the promotion.