ATM on commons if you search for something and a page exists with your search term as a title, you'll automatically be redirected to that page
What this means in practice is that, for common search terms, the user gets a curated gallery page instead of a search results page, and that gallery page only contains a fraction of the available files
Some examples:
Search term "pipistrellus pipistrellus"
- [[ https://commons.wikimedia.org/wiki/Pipistrellus_pipistrellus | gallery page ]] (11 files)
- [[ https://commons.wikimedia.org/w/index.php?sort=relevance&search=Pipistrellus+pipistrellus&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns6=1 | search results in File namespace ]] (374 files)
Search term "barack obama"
- [[ https://commons.wikimedia.org/wiki/Barack_Obama | gallery page ]] (169 files)
- [[ https://commons.wikimedia.org/w/index.php?sort=relevance&search=Barack+Obama&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns6=1 | search results in File namespace ]] (26405 files)
Search term "wexford" (my home town)
- automatically redirected in this case to a [[ https://commons.wikimedia.org/wiki/Category:Wexford | Category page ]] with 16 subcategories and 119 files
- [[ https://commons.wikimedia.org/w/index.php?sort=relevance&search=wexford&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns6=1 | search results in File namespace ]] (2810 files)
Search term "fugazi"
- automatically redirected in this case to a [[ https://commons.wikimedia.org/wiki/Category:Wexford | Category page ]] with 2 subcategories and 12 files
- [[ https://commons.wikimedia.org/w/index.php?sort=relevance&search=fugazi&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns6=1 | search results in File namespace ]] (27 files)
Search term "michelangelo"
- [[ https://commons.wikimedia.org/wiki/Michelangelo | gallery page ]] (180 files)
- [[ https://commons.wikimedia.org/w/index.php?sort=relevance&search=Michelangelo&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns6=1 | search results in File namespace ]] (7405 files)
Search term "poodle"
- [[ https://commons.wikimedia.org/wiki/Poodle | gallery page ]] (80-odd files)
- [[ https://commons.wikimedia.org/w/index.php?sort=relevance&search=poodle&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns6=1 | search results in File namespace ]] (1109 files)
Search term "everest"
- [[ https://commons.wikimedia.org/wiki/%E0%BD%87%E0%BD%BC%E0%BC%8B%E0%BD%98%E0%BD%BC%E0%BC%8B%E0%BD%82%E0%BE%B3%E0%BD%84%E0%BC%8B%E0%BD%98 | gallery page ]] (37 files)
- [[ https://commons.wikimedia.org/w/index.php?sort=relevance&search=everest&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns6=1 | search results in File namespace ]] (4449 files)
Search term "forest"
- [[ https://commons.wikimedia.org/wiki/Forest | gallery page ]] (79 files)
- [[ https://commons.wikimedia.org/w/index.php?sort=relevance&search=forest&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns6=1&ns12=1&ns14=1&ns100=1&ns106=1&ns0=1 | search results in File namespace ]] (571638 files)
Search term "train"
- automatically redirected in this case to a [[ https://commons.wikimedia.org/wiki/Category:Trains | Category page ]] with 63 subcategories (and no files in the main category)
- [[ https://commons.wikimedia.org/w/index.php?sort=relevance&search=trains&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns6=1 | search results in File namespace ]] (508664 files)
Search term "mausoleums in iran"
- [[ https://commons.wikimedia.org/wiki/Mausoleums_in_Iran | gallery page ]] (19 files)
- [[ https://commons.wikimedia.org/w/index.php?sort=relevance&search=Mausoleums+in+Iran&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns6=1 | search results in File namespace ]] (1932 files)
Search term "axe"
- [[ https://commons.wikimedia.org/wiki/Axe | gallery page ]] (20 files)
- [[ https://commons.wikimedia.org/w/index.php?sort=relevance&search=axe&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns6=1 | search results in File namespace ]] (28514 files)