At this time of the year, those with successful lemon trees are giving away some of their produce. Possibly you can cook only so much fish and use lemons as a garnish, before you need a change of diet. So, preserving your excess of lemons makes sense.
I did this last year and I am still working my way through the last jar of preserves that I made.
Recently, when visiting friend C, she showed me some of her latest bottling.
So, if you have a lemon tree or someone gives you a bag of lemons, I strongly recommend you salt the excess and store. Many websites will explain the incredibly easy process. For example, here and here. Most sites show the use of a whole lemon almost quartered. C and I both cut the lemon into wedges and this works fine.