They look to buy companies with huge growth potential that will disrupt markets. They’ve been brilliant at it for a good length of time (402% over 5 years) so there isn’t anything that points towards them cocking it up.
If you’re a little unsure you can diversify a little by buying other funds alongside it. I like JP Morgan UK equity value as it’s been an unloved share type for a while with some huge multinationals that look undervalued. A few others have mentioned trackers too which are a great low cost option to spread risk too