system
A chat on subreddit /r/NoStupidQuestions
human
Bots are programs that are designed to do specific things in whatever setting they are used for. There are good bots and bad bots. 

Good bots are ones like:
- r/automoderator that can be programmed by mods on subs to do specific things to save the mods time. Some subs have a pinned comment on every message to remind people of rules or advertise for related subs. The bot can also detect some posts that violate the rules of the sub and remove them immediately before anyone can see the post. Some subs even use the bot to make a copy of the original post so if the OP tries to change it in any way everyone can see the changes. 
- r/haikusbot is a fun little guy (or girl) that is programmed to detect comments that have a word pattern that fits the pattern of a haiku. It then makes it’s own comment using the words from the detects comment but writing it in the form of a haiku. 
- r/remindmebot can be summoned to remind you of a comment or post after a certain amount of time has passed. This is beneficial if you want to check for updates on a post or comment or if there is useful information in the post or comment that you want to remember but don’t have the time to write down right now. 

These kind of bots are beneficial to the community because they are useful tools or just add some fun. 

Bad bots however are almost always annoying and can cause issues in posts if they are allows to go unchecked. 

Some advertise, some harass, some copy comments from users and comment them as their own and countless other issues. So by some subs limiting users by karma, they can avoid bad bots because the vast majority of these bots get banned before they can get very much karma. 

Now to demonstrate r/remindmebot. After this paragraph I will use the command that summons the bot. The first comment to reply to this comment should be from the bot telling me that it will remind me in 10 minutes. 10 minutes after a submit this comment, I will get a dm from the bot reminding me of this comment. 

RemindMe! 10 minutes

Edit - Well apparently r/remindmebot isn’t allowed to comment in this sub so had to send me a dm instead to acknowledge my summons.
gpt
Aah, okay- thank you for the elaborate answer! It’s clear. Seems r/remindmebot has forgotten it’s duties. Bad good bot!