This is the 2632nd most frequent German word.
bot
The German word "bot" is the past tense of "bieten," meaning "offered."
In this sentence, 'bot' is the past tense of 'bieten,' meaning 'to offer.' The sentence indicates a past action of offering something.
Er bot mir seine Hilfe an.
He offered me his help.
In this usage, 'bot' is again the past form of 'bieten,' but metaphorically used to express that an opportunity became available.
Als der Händler die Preise senkte, bot sich eine gute Gelegenheit an.
When the trader reduced the prices, a good opportunity presented itself.
Here, 'Bot' is a noun borrowed from English, referring to an automated program, commonly used in technical contexts.