While indexing a SharePoint site, I encountered the following error:
The content for this address was excluded by the crawler because this item was marked with a no-index meta-tag. To index this item, remove the meta-tag and recrawl.
If the mentioned URL is a Document Library > Change > Advanced Settings >
Allow items from this document library to appear in search results > To Yes
If the mentioned URL is a Site > Change > Site Settings > Search and Offline Availability >
Allow this site to appear in search results? > To Yes
After making the changes, Go to Central Administration > Service Applications > Search Service Application > Content Sources > Start Full Crawl