If you are planning to have a website (or already have one), you will need somewhere to host it.
There are plenty of options available (just search the web) and they will typically be somewhere in the range of £2 to £10 per month.
For a simple website using WordPress (such as this site), I can provide hosting for £10 for a year.
You will also need to buy a domain if you don’t already have one. Again prices vary depending on which domain you want and where you buy it, but for example a “.uk” or “.co.uk” domain from Cloudflare would cost under $5 (US Dollars) for a year.