Blogging

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Hi, Can anyone give me some info on the different types of URLs required for making blogs?, I have no idea what they are. I know what a URL is but when making a blog I am asked for different URLs and I don't know where to find them or even if it is necessary to fill in all the sections. One website I checked mentioned affiliate URLs but for some reason I don't think that is what it means here. Thank you in advance to anyone that gives me time on this.