What an odd question, I'm trying to figure out what on earth you mean. Growing tips can just mean information on how best to grow something; it can also mean the growing point of a plant, the very tip, in particular with Cordylines, for instance, they have a point at the top from which all new growth comes, and its called the growing tip. I cannot for the life of me, though, fathom why you would want to remove them.

Oh, hold on, had another thought - you might mean pinching out growing tips on, say, seedlings, so that the plants get bushier? Would have been a lot easier if you'd given more info, I'm feeling like Sherlock Holmes right now...

Maybe it's in relation to pinching out the tips of plants to make them bushier ???
I agree, a bit odd, can you chat with a few more words Andy, it might help if we had a fuller picture.

Thanks for the reply. It's the instructions on an orange tree I have just purchased and wanted to make sure I was going to remove the right part of the plant

Welcome, Andyhubbard - ah, all is revealed, they mean the tips of the shoots, although, unless you're keeping it indoors, or in a warm greenhouse, I wouldn't be nipping any growing tips out at this end of the year.

Thanks everyone you can probably tell I don't know a lot about gardening

Well you're not alone in that, lol!