Ziggy Stardust and The Spiders from Mars is about (from my knowledge) how the world is going to end in 5 years and there is only one person who can stop all this and his name is the titular Ziggy Stardust where he promises he will save the world if they (Earthlings) believe in him and his power to deliver on his promise. Very Christ-like.
The album is filled with Bowie's characteristic eccentricity, left-field lyrics. One of my favourite examples is in the title track where they introduce him (Ziggy) and his band (The Spiders from Mars) then the song goes onto make a quip on how he plays guitar left-handed, which is not where you'd think it'd go on next after the introduction. If I was kid in the 70s I would definitely be all about the glam revolution.
The album starts off with "Five Years" which is one of my favourite songs ever made, everything about it is my favourite. The drum beat, the memorable/quotable lyrics, the mood, the urgency, the screaming (especially the screaming.)
I'm honestly not sure what Ziggy is doing during the middle part of the album, but the title track is apparently where Ziggy dies metaphorically or literally, I can't tell honestly. Then that amazing build-up in "Suffragette City" passes ("Wham bam, thank you ma'am.") Then the final song is "Rock 'n' Roll Suicide" where it closes the album, the ending with the strings and all is just amazing. Literally the perfect ending.
Highlight Song/s: "Five Years", "Starman", "Hang on to Yourself" and "Rock 'n' Roll Suicide"