The internet allows you to expand your contacts, to reach across geographic boundaries and to market yourself and/or your company and product to a target audience that can be in the millions or even billions.
But internet connections for networking or sales do not have the same richness of face to face meetings. There is no physical contact, such as maybe a handshake, and no visual clues as to how the other person is reacting. This puts much more emphasis on choosing the right words with which to communicate and being rigorous about asking for feedback.
But internet communications can be enriched by visual enhancements. Videos are becoming a tool that everyone can use.
But the first thing to do is always include a photo or avatar in your communications. Give the recipient a visual tag onto which to hang those word-borne messages you are trying to communicate