Make sure the Search terms are full and qualified. e.g. If you want to know when the Great Fire of London started; use "Date of Great Fire of London" not just "Great Fire of London".
Consider the results:
Are they reliable? e.g. if you need to know the 'UK recommended daily exercise' use an NHS source not a commercial source.
Are they up to date? If you want to know the 'average national wage' make sure the statistics are current.
Are they relevant? If you are researching about 'internet cookies' use a NOT keyword to remove biscuits from your results.
Are they copyright free? You can filter this in your search to make sure your pictures you use are not copyright material.
Are they from a trustworthy source? Don't rely on the search engine for answers - Google often provides a guess of the answer to your question at the top of the search results. Do NOT rely on this - click on some of the more trustworthy-looking search results and find the information on there.
Are several sources of information consistent? Look on more than one website (not Google and a single website) and see if they say the same thing. If so, the information is likely to be reliable.
Providing accurate sources. Sometimes you need to provide the source of information you use in your work. This means copy and paste the web-address (URL) of the page that is the source of the information you searched for.
e.g. https://en.wikipedia.org/wiki/Great_Fire_of_London
A Common mistake is to put in the URL of google page because it showed you the information (often in a snippet after your search) e.g. https://www.google.co.uk/search?q=date+of+the+fire+of+london&rlz=1C1CHBD_en-GBGB685GB686&oq=date+of+the+fire+of+&aqs=chrome.0.0j69i57j0.4103j0j8&sourceid=chrome&ie=UTF-8