Three issues I see with donate.wikimedia.org relating to search engine results:
- These pages do not have description meta tag
- They contain "noindex,nofollow" robots meta tag which should exclude them from search results entirely (but does not)
- The robots.txt file for donate.wikimedia.org is disallowing the /w/ directory from being crawled with lines 148-152:
User-agent: * Allow: /w/api.php?action=mobileview& Allow: /w/load.php? Allow: /api/rest_v1/?doc Disallow: /w/
Perhaps there are reasons why these are set up in this manner, but Google is indexing donate.wikimedia.org very high (see screenshot of a private window search) and the lack of a description meta tag results in an incomplete entry.
Ideally description tags could be unique to each donation page rather than set at a global level.