Eligible UK charities can receive up to $10,000 a month in Google Search advertising through the Google Ad Grant. It is genuinely free money, and it comes with rules that are strict enough that a large share of grantees end up suspended without ever being told clearly why. Accounts must maintain a minimum click-through rate, cannot bid on single-word keywords, need conversion tracking configured properly, must run at least two active ad groups per campaign with two ads each, and require a live sitelink structure. Miss the CTR floor for two consecutive months and the account is deactivated.
The second problem is structural rather than technical. A charity website is usually trying to serve two completely different people with one set of pages: a donor deciding whether to give, and a beneficiary deciding whether to ask for help. Those two arrive on different searches, need different language, and convert on different actions. Sites that blend them tend to underperform for both — the donation page reads clinically to someone in difficulty, and the help page gives a prospective funder nothing to assess.
Then there is reporting. Restricted funding means spend often has to be attributed to a specific programme or grant, which standard marketing reporting simply does not do. If your analytics cannot answer 'what did the youth programme's budget actually deliver', that becomes a problem at the next trustee meeting rather than a problem next year.