Start with your purpose
A portfolio, magazine, store, and service business have different content needs. Pick a theme that supports the layout you need without requiring a stack of extra add-ons.
Check speed and mobile behavior
Preview the theme on phones and desktop. Look for sensible typography, lightweight assets, and stable layouts. Test performance again after adding real content.
Review updates and support
Check changelogs, compatibility notes, documentation, and support channels. Important content should not disappear when you switch themes.
Prefer trusted sources
The official WordPress theme directory reviews submissions against requirements. For commercial themes, buy from the developer and review licensing.
Further reading
This guide is educational. Check current documentation before making technical or purchasing decisions.