To be fair, it should be said that there are no completely free methods. You will have to invest something: either your time or money in the services of specialists. Therefore, for the sake of objectivity, we will call these methods of attracting traffic conditionally free.
Creating quality content
Creating useful content on a regular basis has been a trend in search engine promotion for the last two years. Work in this direction, and users will be drawn to you. Content is not only texts, but also a variety of visual components (infographics, gifs, videos, etc.).
convey unique experience, come up with your own manner of norway cell phone number list communicating with the audience, create an interesting recognizable atmosphere. Materials can be posted on your own website and on guest resources. Any content needs to be optimized: include relevant search queries in the page meta tags, title, context, and description.
What you can't do : create banalities. Repeat or even copy what competitors already have. Release low-quality content.
Attracting traffic through social networks
The method is conditionally free. Now, to successfully promote a page on a social network, you still need to invest in advertising. You can only hope for rapid growth of a project from scratch when the audience is offered something unique or trendy.
What you can do : create an account/group/channel/community. Think through a publication schedule and follow it, offer unique content. If you insert links to a website, do it organically. Stimulate audience activity (using contests, surveys, activations, etc.). Establish cooperation with communities with similar topics.
What you can't do : abandon your account. Make irregular and boring posts. Ignore comments and questions. Block users who have negatively rated the project. Boost subscribers and likes, spam links in other people's groups.
Using backlinks from directories and ratings
The most important condition: no runs (accelerated mass registration). You need to use directories that are not associated with link purchasing exchanges. Otherwise, it will only harm the process.