When I acquired my first 'follower' I had not caught up with the widgetry, and it took me some time to get round to it. When I did, I saw it as something of a vanity item - (but no worse than a hit counter, I suppose) - to have this little collection of heads in the sidebar to show how many reader-followers you have. And as by that time I still only had two, it didn't seem worth declaring that fact publicly.
However, Blogger recommends installing the widget anyway, to encourage more of one's readers to 'Follow', or put you on their reading list, so that they can get a feed direct to their computers. Easier for them, and nice for me to know they are there. So, this is for those of my readers who may not have realised the advantages of this particular piece of widgetry. And please forgive me if I am teaching my grandmother to suck eggs!
If you are a fairly regular reader, (and if you are a Blogger too), you can save yourself the trouble of finding my blog and checking it, to see whether I have added to it since your last visit. You can click on the 'Follow this blog' link above my collection of heads in the sidebar, and this will give you a direct feed to the reading list on your blogger dashboard page, which will tell you when I have made a new post. You will have the option of following openly, identified by name, or of doing so anonymously. (I shall only know you are there, though, if you choose to be identified.)
So make it easy on yourself!