IA strategy is the set of activities required to create an environment for information architecture practice to flourish, including:
- deep analysis rooted in business and customer needs;
- planning activities throughout the business, technology, and design skill stacks;
- tactical IA resource alignment (such as developing targeted taxonomies and information organization schemes that the overall IA strategy can plug in to);
- and so on...
This generally means working within an enterprise or on a large project, but may also include broader strategy activities that connect organizations.