Simplify the following text for a Grade 9 native English-speaking person.
Original: In the 1990s , the development of the World-Wide Web exploded the community of online fandom by orders of magnitude , with thousands and then literally millions of web sites devoted to science fiction and related genres for all media .
Simplified: In the 1990s , the development of the World-Wide Web made the online fan community much , much larger . Fans created thousands and then millions of web sites devoted to science fiction and related genres for all media .