Remember, Your Web Properties are / will be Parts of Eco-System Exclusively Created to achieve your Primary and Supplementary Goals.
Web Presence strategy, for Such an Eco-System, is the Action Plan or Set of Guidelines to achieve Objectives in a Sustainable and Effective manner using different Channels or Properties of Internet Media.
It also stats how and when different web properties or channels should be created, maintained, expanded and regulated depending upon analysis of prevailing situation and its outcome.
All the Stated Objectives in the right side section can be achieved by one or other way. In Most of the cases, there is a huge difference in Cost and Outcome of all the possible ways to achieve such objectives.