I can give a few examples. I volunteered to bring a dessert that did not contain chocolate for a party at work earlier this month. I wanted it to be based on seasonal fruit, and to be finger-food (bars, cookies, or miniature pastries). I used the filters for 1) recipe type: bars, brownies and 2) ingredients: fruit. Then I added "-chocolate" in the search box to exclude chocolate. This retrieved 42 recipes, which I scrolled down. If necessary, I would have chosen a more specific fruit in the ingredient filter. I would have also added "-Christmas" and "-cocoa" in the search box to exclude those recipes. I planned to limit by the cookies and pies/pastries recipe types separately if I didn't find anything in the bars recipe type. I made the Strawberry jam crumble bars from Bake from Scratch, which all of my coworkers enjoyed.
For my regular meal planning, I begin with the main dish based on the protein. I use the filters to select the most specific cut of my meat or type of fish. So I add "chicken breasts" in the search box, the ingredients filter for "chicken pieces", and the course filter for "main course". This retrieves 189 recipes. I then consider: 1) do I want to limit further by recipe type: grilling, curry, pasta, stews, stir fries; 2) do I want to add another ingredient; 3) do I want to limit by region or ethnicity? For the accompanying side dishes, I filter for course: side dish and the region or ethnicity of my main dish. (Sometimes I limit to the continent, sometimes I use the more specific ethnicity, depending on how many results I retrieve.) I often limit to nutrition: vegetarian for my sides (never vegan; I like cheese, butter, & cream). I may specify an ingredient in the search box (based on what is seasonal or on sale at my local grocery).
I have also bookmarked some of my cookbooks as "favorites"; occasionally I limit my search to those books. Then I proceed as specified above.